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Finding the Fourth Proportional to 524,998.40, 786,691.20 and 391,251.20

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Solution

The fourth proportional to 524,998.40, 786,691.20 and 391,251.20 is: 586,275.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,998.40 : 786,691.20 = 391,251.20 : x
  2. Step 2: Convert to fraction form
    524,998.40/786,691.20 = 391,251.20/x
  3. Step 3: Cross multiply
    524,998.40x = 786,691.20 × 391,251.20
  4. Step 4: Simplify right side
    524,998.40x = 307,793,876,029.44
  5. Step 5: Solve for x
    x = 307,793,876,029.44/524,998.40
  6. Step 6: Final answer
    x = 586,275.84

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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.