Home / 672,000.40-1,008,778.20-387,917.20

Finding the Fourth Proportional to 672,000.40, 1,008,778.20 and 387,917.20

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Solution

The fourth proportional to 672,000.40, 1,008,778.20 and 387,917.20 is: 582,324.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,000.40 : 1,008,778.20 = 387,917.20 : x
  2. Step 2: Convert to fraction form
    672,000.40/1,008,778.20 = 387,917.20/x
  3. Step 3: Cross multiply
    672,000.40x = 1,008,778.20 × 387,917.20
  4. Step 4: Simplify right side
    672,000.40x = 391,322,414,765.04
  5. Step 5: Solve for x
    x = 391,322,414,765.04/672,000.40
  6. Step 6: Final answer
    x = 582,324.68

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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.