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Finding the Fourth Proportional to 359.11, 538.44 and 127.90

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Solution

The fourth proportional to 359.11, 538.44 and 127.90 is: 191.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.11 : 538.44 = 127.90 : x
  2. Step 2: Convert to fraction form
    359.11/538.44 = 127.90/x
  3. Step 3: Cross multiply
    359.11x = 538.44 × 127.90
  4. Step 4: Simplify right side
    359.11x = 68,866.48
  5. Step 5: Solve for x
    x = 68,866.48/359.11
  6. Step 6: Final answer
    x = 191.77

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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.