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Finding the Fourth Proportional to 391,545.49, 540,171.40 and 238,527.85

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Solution

The fourth proportional to 391,545.49, 540,171.40 and 238,527.85 is: 329,070.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,545.49 : 540,171.40 = 238,527.85 : x
  2. Step 2: Convert to fraction form
    391,545.49/540,171.40 = 238,527.85/x
  3. Step 3: Cross multiply
    391,545.49x = 540,171.40 × 238,527.85
  4. Step 4: Simplify right side
    391,545.49x = 128,845,921,480.85
  5. Step 5: Solve for x
    x = 128,845,921,480.85/391,545.49
  6. Step 6: Final answer
    x = 329,070.12

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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.