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Finding the Fourth Proportional to 1,380,661,456.76, 1,905,300,189.88 and 754,129,696.76

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Solution

The fourth proportional to 1,380,661,456.76, 1,905,300,189.88 and 754,129,696.76 is: 1,040,692,088.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,661,456.76 : 1,905,300,189.88 = 754,129,696.76 : x
  2. Step 2: Convert to fraction form
    1,380,661,456.76/1,905,300,189.88 = 754,129,696.76/x
  3. Step 3: Cross multiply
    1,380,661,456.76x = 1,905,300,189.88 × 754,129,696.76
  4. Step 4: Simplify right side
    1,380,661,456.76x = 1,436,843,454,430,974,976
  5. Step 5: Solve for x
    x = 1,436,843,454,430,974,976/1,380,661,456.76
  6. Step 6: Final answer
    x = 1,040,692,088.13

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Double scale
Find fourth proportional to 1,380,661,457.76, 1,905,300,191.26 and 754,129,697.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.