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Finding the Fourth Proportional to 391,048.38, 539,553.72 and 238,084.82

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Solution

The fourth proportional to 391,048.38, 539,553.72 and 238,084.82 is: 328,500.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,048.38 : 539,553.72 = 238,084.82 : x
  2. Step 2: Convert to fraction form
    391,048.38/539,553.72 = 238,084.82/x
  3. Step 3: Cross multiply
    391,048.38x = 539,553.72 × 238,084.82
  4. Step 4: Simplify right side
    391,048.38x = 128,459,550,306.53
  5. Step 5: Solve for x
    x = 128,459,550,306.53/391,048.38
  6. Step 6: Final answer
    x = 328,500.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.