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Finding the Fourth Proportional to 713,126.40, 984,098.56 and 390,829.44

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Solution

The fourth proportional to 713,126.40, 984,098.56 and 390,829.44 is: 539,335.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,126.40 : 984,098.56 = 390,829.44 : x
  2. Step 2: Convert to fraction form
    713,126.40/984,098.56 = 390,829.44/x
  3. Step 3: Cross multiply
    713,126.40x = 984,098.56 × 390,829.44
  4. Step 4: Simplify right side
    713,126.40x = 384,614,689,109.61
  5. Step 5: Solve for x
    x = 384,614,689,109.61/713,126.40
  6. Step 6: Final answer
    x = 539,335.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.