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Finding the Fourth Proportional to 359.40, 495.78 and 219.48

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Solution

The fourth proportional to 359.40, 495.78 and 219.48 is: 302.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.40 : 495.78 = 219.48 : x
  2. Step 2: Convert to fraction form
    359.40/495.78 = 219.48/x
  3. Step 3: Cross multiply
    359.40x = 495.78 × 219.48
  4. Step 4: Simplify right side
    359.40x = 108,813.79
  5. Step 5: Solve for x
    x = 108,813.79/359.40
  6. Step 6: Final answer
    x = 302.77

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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.