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Finding the Fourth Proportional to 521,131.72, 781,124.10 and 341,000.68

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Solution

The fourth proportional to 521,131.72, 781,124.10 and 341,000.68 is: 511,125.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,131.72 : 781,124.10 = 341,000.68 : x
  2. Step 2: Convert to fraction form
    521,131.72/781,124.10 = 341,000.68/x
  3. Step 3: Cross multiply
    521,131.72x = 781,124.10 × 341,000.68
  4. Step 4: Simplify right side
    521,131.72x = 266,363,849,264.39
  5. Step 5: Solve for x
    x = 266,363,849,264.39/521,131.72
  6. Step 6: Final answer
    x = 511,125.77

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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.