Home / 257,981.31-386,513.68-220,157.55

Finding the Fourth Proportional to 257,981.31, 386,513.68 and 220,157.55

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Solution

The fourth proportional to 257,981.31, 386,513.68 and 220,157.55 is: 329,845.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,981.31 : 386,513.68 = 220,157.55 : x
  2. Step 2: Convert to fraction form
    257,981.31/386,513.68 = 220,157.55/x
  3. Step 3: Cross multiply
    257,981.31x = 386,513.68 × 220,157.55
  4. Step 4: Simplify right side
    257,981.31x = 85,093,904,830.28
  5. Step 5: Solve for x
    x = 85,093,904,830.28/257,981.31
  6. Step 6: Final answer
    x = 329,845.23

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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.