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Finding the Fourth Proportional to 359,418.20, 539,321.70 and 149,077.40

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Solution

The fourth proportional to 359,418.20, 539,321.70 and 149,077.40 is: 223,696.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,418.20 : 539,321.70 = 149,077.40 : x
  2. Step 2: Convert to fraction form
    359,418.20/539,321.70 = 149,077.40/x
  3. Step 3: Cross multiply
    359,418.20x = 539,321.70 × 149,077.40
  4. Step 4: Simplify right side
    359,418.20x = 80,400,676,799.58
  5. Step 5: Solve for x
    x = 80,400,676,799.58/359,418.20
  6. Step 6: Final answer
    x = 223,696.73

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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.