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Finding the Fourth Proportional to 359.98, 540.04 and 143.72

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Solution

The fourth proportional to 359.98, 540.04 and 143.72 is: 215.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.98 : 540.04 = 143.72 : x
  2. Step 2: Convert to fraction form
    359.98/540.04 = 143.72/x
  3. Step 3: Cross multiply
    359.98x = 540.04 × 143.72
  4. Step 4: Simplify right side
    359.98x = 77,614.55
  5. Step 5: Solve for x
    x = 77,614.55/359.98
  6. Step 6: Final answer
    x = 215.61

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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.