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Finding the Fourth Proportional to 359.21, 538.71 and 115.60

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Solution

The fourth proportional to 359.21, 538.71 and 115.60 is: 173.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.21 : 538.71 = 115.60 : x
  2. Step 2: Convert to fraction form
    359.21/538.71 = 115.60/x
  3. Step 3: Cross multiply
    359.21x = 538.71 × 115.60
  4. Step 4: Simplify right side
    359.21x = 62,274.88
  5. Step 5: Solve for x
    x = 62,274.88/359.21
  6. Step 6: Final answer
    x = 173.37

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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.