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Finding the Fourth Proportional to 297.79, 410.88 and 187.22

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Solution

The fourth proportional to 297.79, 410.88 and 187.22 is: 258.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.79 : 410.88 = 187.22 : x
  2. Step 2: Convert to fraction form
    297.79/410.88 = 187.22/x
  3. Step 3: Cross multiply
    297.79x = 410.88 × 187.22
  4. Step 4: Simplify right side
    297.79x = 76,926.16
  5. Step 5: Solve for x
    x = 76,926.16/297.79
  6. Step 6: Final answer
    x = 258.33

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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.