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Finding the Fourth Proportional to 292.24, 402.84 and 218.56

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Solution

The fourth proportional to 292.24, 402.84 and 218.56 is: 301.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.24 : 402.84 = 218.56 : x
  2. Step 2: Convert to fraction form
    292.24/402.84 = 218.56/x
  3. Step 3: Cross multiply
    292.24x = 402.84 × 218.56
  4. Step 4: Simplify right side
    292.24x = 88,044.71
  5. Step 5: Solve for x
    x = 88,044.71/292.24
  6. Step 6: Final answer
    x = 301.28

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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.