Home / 257,979.31-386,510.68-220,155.55

Finding the Fourth Proportional to 257,979.31, 386,510.68 and 220,155.55

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Solution

The fourth proportional to 257,979.31, 386,510.68 and 220,155.55 is: 329,842.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,979.31 : 386,510.68 = 220,155.55 : x
  2. Step 2: Convert to fraction form
    257,979.31/386,510.68 = 220,155.55/x
  3. Step 3: Cross multiply
    257,979.31x = 386,510.68 × 220,155.55
  4. Step 4: Simplify right side
    257,979.31x = 85,092,471,336.27
  5. Step 5: Solve for x
    x = 85,092,471,336.27/257,979.31
  6. Step 6: Final answer
    x = 329,842.23

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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.