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Finding the Fourth Proportional to 521,124.90, 781,687.35 and 486,132.90

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Solution

The fourth proportional to 521,124.90, 781,687.35 and 486,132.90 is: 729,199.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,124.90 : 781,687.35 = 486,132.90 : x
  2. Step 2: Convert to fraction form
    521,124.90/781,687.35 = 486,132.90/x
  3. Step 3: Cross multiply
    521,124.90x = 781,687.35 × 486,132.90
  4. Step 4: Simplify right side
    521,124.90x = 380,003,938,348.82
  5. Step 5: Solve for x
    x = 380,003,938,348.82/521,124.90
  6. Step 6: Final answer
    x = 729,199.35

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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.