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Finding the Fourth Proportional to 359.88, 540.12 and 143.61

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Solution

The fourth proportional to 359.88, 540.12 and 143.61 is: 215.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.88 : 540.12 = 143.61 : x
  2. Step 2: Convert to fraction form
    359.88/540.12 = 143.61/x
  3. Step 3: Cross multiply
    359.88x = 540.12 × 143.61
  4. Step 4: Simplify right side
    359.88x = 77,566.63
  5. Step 5: Solve for x
    x = 77,566.63/359.88
  6. Step 6: Final answer
    x = 215.53

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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.