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Finding the Fourth Proportional to 360.40, 497.20 and 243.76

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Solution

The fourth proportional to 360.40, 497.20 and 243.76 is: 336.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.40 : 497.20 = 243.76 : x
  2. Step 2: Convert to fraction form
    360.40/497.20 = 243.76/x
  3. Step 3: Cross multiply
    360.40x = 497.20 × 243.76
  4. Step 4: Simplify right side
    360.40x = 121,197.47
  5. Step 5: Solve for x
    x = 121,197.47/360.40
  6. Step 6: Final answer
    x = 336.29

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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.