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Finding the Fourth Proportional to 292.79, 403.72 and 218.97

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Solution

The fourth proportional to 292.79, 403.72 and 218.97 is: 301.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.79 : 403.72 = 218.97 : x
  2. Step 2: Convert to fraction form
    292.79/403.72 = 218.97/x
  3. Step 3: Cross multiply
    292.79x = 403.72 × 218.97
  4. Step 4: Simplify right side
    292.79x = 88,402.02
  5. Step 5: Solve for x
    x = 88,402.02/292.79
  6. Step 6: Final answer
    x = 301.93

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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.