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Finding the Fourth Proportional to 359.12, 538.63 and 142.63

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Solution

The fourth proportional to 359.12, 538.63 and 142.63 is: 213.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.12 : 538.63 = 142.63 : x
  2. Step 2: Convert to fraction form
    359.12/538.63 = 142.63/x
  3. Step 3: Cross multiply
    359.12x = 538.63 × 142.63
  4. Step 4: Simplify right side
    359.12x = 76,824.80
  5. Step 5: Solve for x
    x = 76,824.80/359.12
  6. Step 6: Final answer
    x = 213.93

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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.