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Finding the Fourth Proportional to 261,691.83, 391,939.97 and 156,294.63

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Solution

The fourth proportional to 261,691.83, 391,939.97 and 156,294.63 is: 234,084.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,691.83 : 391,939.97 = 156,294.63 : x
  2. Step 2: Convert to fraction form
    261,691.83/391,939.97 = 156,294.63/x
  3. Step 3: Cross multiply
    261,691.83x = 391,939.97 × 156,294.63
  4. Step 4: Simplify right side
    261,691.83x = 61,258,111,811.89
  5. Step 5: Solve for x
    x = 61,258,111,811.89/261,691.83
  6. Step 6: Final answer
    x = 234,084.92

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1.5x scale

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.