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Finding the Fourth Proportional to 359,388.80, 539,212.80 and 149,091.20

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Solution

The fourth proportional to 359,388.80, 539,212.80 and 149,091.20 is: 223,690.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,388.80 : 539,212.80 = 149,091.20 : x
  2. Step 2: Convert to fraction form
    359,388.80/539,212.80 = 149,091.20/x
  3. Step 3: Cross multiply
    359,388.80x = 539,212.80 × 149,091.20
  4. Step 4: Simplify right side
    359,388.80x = 80,391,883,407.36
  5. Step 5: Solve for x
    x = 80,391,883,407.36/359,388.80
  6. Step 6: Final answer
    x = 223,690.56

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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.