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Finding the Fourth Proportional to 868,915.20, 1,304,539.20 and 554,764.80

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Solution

The fourth proportional to 868,915.20, 1,304,539.20 and 554,764.80 is: 832,891.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,915.20 : 1,304,539.20 = 554,764.80 : x
  2. Step 2: Convert to fraction form
    868,915.20/1,304,539.20 = 554,764.80/x
  3. Step 3: Cross multiply
    868,915.20x = 1,304,539.20 × 554,764.80
  4. Step 4: Simplify right side
    868,915.20x = 723,712,428,380.16
  5. Step 5: Solve for x
    x = 723,712,428,380.16/868,915.20
  6. Step 6: Final answer
    x = 832,891.90

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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.