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Finding the Fourth Proportional to 359.32, 538.80 and 136.84

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Solution

The fourth proportional to 359.32, 538.80 and 136.84 is: 205.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.32 : 538.80 = 136.84 : x
  2. Step 2: Convert to fraction form
    359.32/538.80 = 136.84/x
  3. Step 3: Cross multiply
    359.32x = 538.80 × 136.84
  4. Step 4: Simplify right side
    359.32x = 73,729.39
  5. Step 5: Solve for x
    x = 73,729.39/359.32
  6. Step 6: Final answer
    x = 205.19

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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.