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Finding the Fourth Proportional to 359.22, 538.82 and 99.22

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Solution

The fourth proportional to 359.22, 538.82 and 99.22 is: 148.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.22 : 538.82 = 99.22 : x
  2. Step 2: Convert to fraction form
    359.22/538.82 = 99.22/x
  3. Step 3: Cross multiply
    359.22x = 538.82 × 99.22
  4. Step 4: Simplify right side
    359.22x = 53,461.82
  5. Step 5: Solve for x
    x = 53,461.82/359.22
  6. Step 6: Final answer
    x = 148.83

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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.