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Finding the Fourth Proportional to 359.13, 495.52 and 211.78

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Solution

The fourth proportional to 359.13, 495.52 and 211.78 is: 292.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.13 : 495.52 = 211.78 : x
  2. Step 2: Convert to fraction form
    359.13/495.52 = 211.78/x
  3. Step 3: Cross multiply
    359.13x = 495.52 × 211.78
  4. Step 4: Simplify right side
    359.13x = 104,941.23
  5. Step 5: Solve for x
    x = 104,941.23/359.13
  6. Step 6: Final answer
    x = 292.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.