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Finding the Fourth Proportional to 521,124.60, 781,686.90 and 513,251.40

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Solution

The fourth proportional to 521,124.60, 781,686.90 and 513,251.40 is: 769,877.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,124.60 : 781,686.90 = 513,251.40 : x
  2. Step 2: Convert to fraction form
    521,124.60/781,686.90 = 513,251.40/x
  3. Step 3: Cross multiply
    521,124.60x = 781,686.90 × 513,251.40
  4. Step 4: Simplify right side
    521,124.60x = 401,201,895,786.66
  5. Step 5: Solve for x
    x = 401,201,895,786.66/521,124.60
  6. Step 6: Final answer
    x = 769,877.10

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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.