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Finding the Fourth Proportional to 359.20, 495.76 and 294.40

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Solution

The fourth proportional to 359.20, 495.76 and 294.40 is: 406.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.20 : 495.76 = 294.40 : x
  2. Step 2: Convert to fraction form
    359.20/495.76 = 294.40/x
  3. Step 3: Cross multiply
    359.20x = 495.76 × 294.40
  4. Step 4: Simplify right side
    359.20x = 145,951.74
  5. Step 5: Solve for x
    x = 145,951.74/359.20
  6. Step 6: Final answer
    x = 406.32

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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.