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Finding the Fourth Proportional to 919,873,347.20, 1,379,810,020.80 and 738,474,819.20

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Solution

The fourth proportional to 919,873,347.20, 1,379,810,020.80 and 738,474,819.20 is: 1,107,712,228.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,873,347.20 : 1,379,810,020.80 = 738,474,819.20 : x
  2. Step 2: Convert to fraction form
    919,873,347.20/1,379,810,020.80 = 738,474,819.20/x
  3. Step 3: Cross multiply
    919,873,347.20x = 1,379,810,020.80 × 738,474,819.20
  4. Step 4: Simplify right side
    919,873,347.20x = 1,018,954,955,640,628,224
  5. Step 5: Solve for x
    x = 1,018,954,955,640,628,224/919,873,347.20
  6. Step 6: Final answer
    x = 1,107,712,228.80

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.