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Finding the Fourth Proportional to 704,687.31, 972,516.92 and 398,763.27

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Solution

The fourth proportional to 704,687.31, 972,516.92 and 398,763.27 is: 550,320.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,687.31 : 972,516.92 = 398,763.27 : x
  2. Step 2: Convert to fraction form
    704,687.31/972,516.92 = 398,763.27/x
  3. Step 3: Cross multiply
    704,687.31x = 972,516.92 × 398,763.27
  4. Step 4: Simplify right side
    704,687.31x = 387,804,025,155.71
  5. Step 5: Solve for x
    x = 387,804,025,155.71/704,687.31
  6. Step 6: Final answer
    x = 550,320.72

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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.