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Finding the Fourth Proportional to 257,414.60, 386,121.90 and 248,083.40

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Solution

The fourth proportional to 257,414.60, 386,121.90 and 248,083.40 is: 372,125.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,414.60 : 386,121.90 = 248,083.40 : x
  2. Step 2: Convert to fraction form
    257,414.60/386,121.90 = 248,083.40/x
  3. Step 3: Cross multiply
    257,414.60x = 386,121.90 × 248,083.40
  4. Step 4: Simplify right side
    257,414.60x = 95,790,433,766.46
  5. Step 5: Solve for x
    x = 95,790,433,766.46/257,414.60
  6. Step 6: Final answer
    x = 372,125.10

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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.