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Finding the Fourth Proportional to 717,549.16, 990,213.24 and 395,251.78

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Solution

The fourth proportional to 717,549.16, 990,213.24 and 395,251.78 is: 545,444.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,549.16 : 990,213.24 = 395,251.78 : x
  2. Step 2: Convert to fraction form
    717,549.16/990,213.24 = 395,251.78/x
  3. Step 3: Cross multiply
    717,549.16x = 990,213.24 × 395,251.78
  4. Step 4: Simplify right side
    717,549.16x = 391,383,545,689.57
  5. Step 5: Solve for x
    x = 391,383,545,689.57/717,549.16
  6. Step 6: Final answer
    x = 545,444.92

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.