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Finding the Fourth Proportional to 360.43, 497.34 and 220.61

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Solution

The fourth proportional to 360.43, 497.34 and 220.61 is: 304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    360.43 : 497.34 = 220.61 : x
  2. Step 2: Convert to fraction form
    360.43/497.34 = 220.61/x
  3. Step 3: Cross multiply
    360.43x = 497.34 × 220.61
  4. Step 4: Simplify right side
    360.43x = 109,715.69
  5. Step 5: Solve for x
    x = 109,715.69/360.43
  6. Step 6: Final answer
    x = 304.40

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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.