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Finding the Fourth Proportional to 257,874.30, 386,811.45 and 235,712.70

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Solution

The fourth proportional to 257,874.30, 386,811.45 and 235,712.70 is: 353,569.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,874.30 : 386,811.45 = 235,712.70 : x
  2. Step 2: Convert to fraction form
    257,874.30/386,811.45 = 235,712.70/x
  3. Step 3: Cross multiply
    257,874.30x = 386,811.45 × 235,712.70
  4. Step 4: Simplify right side
    257,874.30x = 91,176,371,270.42
  5. Step 5: Solve for x
    x = 91,176,371,270.42/257,874.30
  6. Step 6: Final answer
    x = 353,569.05

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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.