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Finding the Fourth Proportional to 359.55, 495.99 and 318.11

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Solution

The fourth proportional to 359.55, 495.99 and 318.11 is: 438.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.55 : 495.99 = 318.11 : x
  2. Step 2: Convert to fraction form
    359.55/495.99 = 318.11/x
  3. Step 3: Cross multiply
    359.55x = 495.99 × 318.11
  4. Step 4: Simplify right side
    359.55x = 157,776.90
  5. Step 5: Solve for x
    x = 157,776.90/359.55
  6. Step 6: Final answer
    x = 438.82

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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.