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Finding the Fourth Proportional to 518,870.80, 715,959.36 and 292,472.56

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Solution

The fourth proportional to 518,870.80, 715,959.36 and 292,472.56 is: 403,565.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,870.80 : 715,959.36 = 292,472.56 : x
  2. Step 2: Convert to fraction form
    518,870.80/715,959.36 = 292,472.56/x
  3. Step 3: Cross multiply
    518,870.80x = 715,959.36 × 292,472.56
  4. Step 4: Simplify right side
    518,870.80x = 209,398,466,875.16
  5. Step 5: Solve for x
    x = 209,398,466,875.16/518,870.80
  6. Step 6: Final answer
    x = 403,565.72

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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.