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Finding the Fourth Proportional to 866,999.80, 1,300,499.70 and 709,406.20

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Solution

The fourth proportional to 866,999.80, 1,300,499.70 and 709,406.20 is: 1,064,109.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,999.80 : 1,300,499.70 = 709,406.20 : x
  2. Step 2: Convert to fraction form
    866,999.80/1,300,499.70 = 709,406.20/x
  3. Step 3: Cross multiply
    866,999.80x = 1,300,499.70 × 709,406.20
  4. Step 4: Simplify right side
    866,999.80x = 922,582,550,278.14
  5. Step 5: Solve for x
    x = 922,582,550,278.14/866,999.80
  6. Step 6: Final answer
    x = 1,064,109.30

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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.