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Finding the Fourth Proportional to 728,728.40, 1,092,617.40 and 654,078.80

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Solution

The fourth proportional to 728,728.40, 1,092,617.40 and 654,078.80 is: 980,691.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,728.40 : 1,092,617.40 = 654,078.80 : x
  2. Step 2: Convert to fraction form
    728,728.40/1,092,617.40 = 654,078.80/x
  3. Step 3: Cross multiply
    728,728.40x = 1,092,617.40 × 654,078.80
  4. Step 4: Simplify right side
    728,728.40x = 714,657,877,851.12
  5. Step 5: Solve for x
    x = 714,657,877,851.12/728,728.40
  6. Step 6: Final answer
    x = 980,691.68

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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.