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Finding the Fourth Proportional to 359.12, 495.61 and 209.84

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Solution

The fourth proportional to 359.12, 495.61 and 209.84 is: 289.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.12 : 495.61 = 209.84 : x
  2. Step 2: Convert to fraction form
    359.12/495.61 = 209.84/x
  3. Step 3: Cross multiply
    359.12x = 495.61 × 209.84
  4. Step 4: Simplify right side
    359.12x = 103,999.86
  5. Step 5: Solve for x
    x = 103,999.86/359.12
  6. Step 6: Final answer
    x = 289.59

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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.