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Finding the Fourth Proportional to 521,738.10, 782,607.15 and 486,486.90

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Solution

The fourth proportional to 521,738.10, 782,607.15 and 486,486.90 is: 729,730.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,738.10 : 782,607.15 = 486,486.90 : x
  2. Step 2: Convert to fraction form
    521,738.10/782,607.15 = 486,486.90/x
  3. Step 3: Cross multiply
    521,738.10x = 782,607.15 × 486,486.90
  4. Step 4: Simplify right side
    521,738.10x = 380,728,126,321.34
  5. Step 5: Solve for x
    x = 380,728,126,321.34/521,738.10
  6. Step 6: Final answer
    x = 729,730.35

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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.