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Finding the Fourth Proportional to 360.40, 495.84 and 281.20

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Solution

The fourth proportional to 360.40, 495.84 and 281.20 is: 386.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.40 : 495.84 = 281.20 : x
  2. Step 2: Convert to fraction form
    360.40/495.84 = 281.20/x
  3. Step 3: Cross multiply
    360.40x = 495.84 × 281.20
  4. Step 4: Simplify right side
    360.40x = 139,430.21
  5. Step 5: Solve for x
    x = 139,430.21/360.40
  6. Step 6: Final answer
    x = 386.88

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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.