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Finding the Fourth Proportional to 747,706.60, 1,121,559.90 and 689,969.80

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Solution

The fourth proportional to 747,706.60, 1,121,559.90 and 689,969.80 is: 1,034,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,706.60 : 1,121,559.90 = 689,969.80 : x
  2. Step 2: Convert to fraction form
    747,706.60/1,121,559.90 = 689,969.80/x
  3. Step 3: Cross multiply
    747,706.60x = 1,121,559.90 × 689,969.80
  4. Step 4: Simplify right side
    747,706.60x = 773,842,459,891.02
  5. Step 5: Solve for x
    x = 773,842,459,891.02/747,706.60
  6. Step 6: Final answer
    x = 1,034,954.70

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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.