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Finding the Fourth Proportional to 439,443, 659,233.26 and 139,990.68

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Solution

The fourth proportional to 439,443, 659,233.26 and 139,990.68 is: 210,007.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,443 : 659,233.26 = 139,990.68 : x
  2. Step 2: Convert to fraction form
    439,443/659,233.26 = 139,990.68/x
  3. Step 3: Cross multiply
    439,443x = 659,233.26 × 139,990.68
  4. Step 4: Simplify right side
    439,443x = 92,286,512,346.02
  5. Step 5: Solve for x
    x = 92,286,512,346.02/439,443
  6. Step 6: Final answer
    x = 210,007.92

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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.