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Finding the Fourth Proportional to 524,103.40, 786,155.10 and 391,243.15

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Solution

The fourth proportional to 524,103.40, 786,155.10 and 391,243.15 is: 586,864.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    524,103.40 : 786,155.10 = 391,243.15 : x
  2. Step 2: Convert to fraction form
    524,103.40/786,155.10 = 391,243.15/x
  3. Step 3: Cross multiply
    524,103.40x = 786,155.10 × 391,243.15
  4. Step 4: Simplify right side
    524,103.40x = 307,577,797,712.57
  5. Step 5: Solve for x
    x = 307,577,797,712.57/524,103.40
  6. Step 6: Final answer
    x = 586,864.73

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Double scale
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Similar ratio
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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.