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Finding the Fourth Proportional to 714,429.59, 985,925.54 and 392,169.65

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Solution

The fourth proportional to 714,429.59, 985,925.54 and 392,169.65 is: 541,201.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,429.59 : 985,925.54 = 392,169.65 : x
  2. Step 2: Convert to fraction form
    714,429.59/985,925.54 = 392,169.65/x
  3. Step 3: Cross multiply
    714,429.59x = 985,925.54 × 392,169.65
  4. Step 4: Simplify right side
    714,429.59x = 386,650,069,998.66
  5. Step 5: Solve for x
    x = 386,650,069,998.66/714,429.59
  6. Step 6: Final answer
    x = 541,201.09

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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.