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Finding the Fourth Proportional to 521,122.60, 781,683.90 and 513,249.40

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Solution

The fourth proportional to 521,122.60, 781,683.90 and 513,249.40 is: 769,874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,122.60 : 781,683.90 = 513,249.40 : x
  2. Step 2: Convert to fraction form
    521,122.60/781,683.90 = 513,249.40/x
  3. Step 3: Cross multiply
    521,122.60x = 781,683.90 × 513,249.40
  4. Step 4: Simplify right side
    521,122.60x = 401,198,792,664.66
  5. Step 5: Solve for x
    x = 401,198,792,664.66/521,122.60
  6. Step 6: Final answer
    x = 769,874.10

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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.