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Finding the Fourth Proportional to 485,923.17, 728,801.72 and 130,854.15

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Solution

The fourth proportional to 485,923.17, 728,801.72 and 130,854.15 is: 196,258.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,923.17 : 728,801.72 = 130,854.15 : x
  2. Step 2: Convert to fraction form
    485,923.17/728,801.72 = 130,854.15/x
  3. Step 3: Cross multiply
    485,923.17x = 728,801.72 × 130,854.15
  4. Step 4: Simplify right side
    485,923.17x = 95,366,728,934.87
  5. Step 5: Solve for x
    x = 95,366,728,934.87/485,923.17
  6. Step 6: Final answer
    x = 196,258.86

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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.