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Finding the Fourth Proportional to 439,403.67, 659,105.51 and 139,976.10

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Solution

The fourth proportional to 439,403.67, 659,105.51 and 139,976.10 is: 209,964.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,403.67 : 659,105.51 = 139,976.10 : x
  2. Step 2: Convert to fraction form
    439,403.67/659,105.51 = 139,976.10/x
  3. Step 3: Cross multiply
    439,403.67x = 659,105.51 × 139,976.10
  4. Step 4: Simplify right side
    439,403.67x = 92,259,018,078.43
  5. Step 5: Solve for x
    x = 92,259,018,078.43/439,403.67
  6. Step 6: Final answer
    x = 209,964.15

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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.