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Finding the Fourth Proportional to 359.01, 538.61 and 142.61

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Solution

The fourth proportional to 359.01, 538.61 and 142.61 is: 213.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.01 : 538.61 = 142.61 : x
  2. Step 2: Convert to fraction form
    359.01/538.61 = 142.61/x
  3. Step 3: Cross multiply
    359.01x = 538.61 × 142.61
  4. Step 4: Simplify right side
    359.01x = 76,807.77
  5. Step 5: Solve for x
    x = 76,807.77/359.01
  6. Step 6: Final answer
    x = 213.94

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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.