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Finding the Fourth Proportional to 649,192.76, 895,920.14 and 391,150.78

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Solution

The fourth proportional to 649,192.76, 895,920.14 and 391,150.78 is: 539,808.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,192.76 : 895,920.14 = 391,150.78 : x
  2. Step 2: Convert to fraction form
    649,192.76/895,920.14 = 391,150.78/x
  3. Step 3: Cross multiply
    649,192.76x = 895,920.14 × 391,150.78
  4. Step 4: Simplify right side
    649,192.76x = 350,439,861,578.71
  5. Step 5: Solve for x
    x = 350,439,861,578.71/649,192.76
  6. Step 6: Final answer
    x = 539,808.64

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Double scale
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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.