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Finding the Fourth Proportional to 521,659.60, 782,489.40 and 486,408.40

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Solution

The fourth proportional to 521,659.60, 782,489.40 and 486,408.40 is: 729,612.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,659.60 : 782,489.40 = 486,408.40 : x
  2. Step 2: Convert to fraction form
    521,659.60/782,489.40 = 486,408.40/x
  3. Step 3: Cross multiply
    521,659.60x = 782,489.40 × 486,408.40
  4. Step 4: Simplify right side
    521,659.60x = 380,609,417,070.96
  5. Step 5: Solve for x
    x = 380,609,417,070.96/521,659.60
  6. Step 6: Final answer
    x = 729,612.60

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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.