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Finding the Fourth Proportional to 418,832.20, 628,248.30 and 259,399.90

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Solution

The fourth proportional to 418,832.20, 628,248.30 and 259,399.90 is: 389,099.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,832.20 : 628,248.30 = 259,399.90 : x
  2. Step 2: Convert to fraction form
    418,832.20/628,248.30 = 259,399.90/x
  3. Step 3: Cross multiply
    418,832.20x = 628,248.30 × 259,399.90
  4. Step 4: Simplify right side
    418,832.20x = 162,967,546,195.17
  5. Step 5: Solve for x
    x = 162,967,546,195.17/418,832.20
  6. Step 6: Final answer
    x = 389,099.85

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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.