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Finding the Fourth Proportional to 360.48, 495.48 and 318.81

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Solution

The fourth proportional to 360.48, 495.48 and 318.81 is: 438.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.48 : 495.48 = 318.81 : x
  2. Step 2: Convert to fraction form
    360.48/495.48 = 318.81/x
  3. Step 3: Cross multiply
    360.48x = 495.48 × 318.81
  4. Step 4: Simplify right side
    360.48x = 157,963.98
  5. Step 5: Solve for x
    x = 157,963.98/360.48
  6. Step 6: Final answer
    x = 438.20

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.