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Finding the Fourth Proportional to 436,679.66, 655,013.33 and 137,178.21

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Solution

The fourth proportional to 436,679.66, 655,013.33 and 137,178.21 is: 205,765.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,679.66 : 655,013.33 = 137,178.21 : x
  2. Step 2: Convert to fraction form
    436,679.66/655,013.33 = 137,178.21/x
  3. Step 3: Cross multiply
    436,679.66x = 655,013.33 × 137,178.21
  4. Step 4: Simplify right side
    436,679.66x = 89,853,555,507.54
  5. Step 5: Solve for x
    x = 89,853,555,507.54/436,679.66
  6. Step 6: Final answer
    x = 205,765.38

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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.