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Finding the Fourth Proportional to 359.72, 495.12 and 318.44

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Solution

The fourth proportional to 359.72, 495.12 and 318.44 is: 438.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.72 : 495.12 = 318.44 : x
  2. Step 2: Convert to fraction form
    359.72/495.12 = 318.44/x
  3. Step 3: Cross multiply
    359.72x = 495.12 × 318.44
  4. Step 4: Simplify right side
    359.72x = 157,666.01
  5. Step 5: Solve for x
    x = 157,666.01/359.72
  6. Step 6: Final answer
    x = 438.30

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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.