Home / 445,234.20-667,851.30-389,938.20

Finding the Fourth Proportional to 445,234.20, 667,851.30 and 389,938.20

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Solution

The fourth proportional to 445,234.20, 667,851.30 and 389,938.20 is: 584,907.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,234.20 : 667,851.30 = 389,938.20 : x
  2. Step 2: Convert to fraction form
    445,234.20/667,851.30 = 389,938.20/x
  3. Step 3: Cross multiply
    445,234.20x = 667,851.30 × 389,938.20
  4. Step 4: Simplify right side
    445,234.20x = 260,420,733,789.66
  5. Step 5: Solve for x
    x = 260,420,733,789.66/445,234.20
  6. Step 6: Final answer
    x = 584,907.30

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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.