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Finding the Fourth Proportional to 297.72, 410.85 and 187.02

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Solution

The fourth proportional to 297.72, 410.85 and 187.02 is: 258.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.72 : 410.85 = 187.02 : x
  2. Step 2: Convert to fraction form
    297.72/410.85 = 187.02/x
  3. Step 3: Cross multiply
    297.72x = 410.85 × 187.02
  4. Step 4: Simplify right side
    297.72x = 76,837.17
  5. Step 5: Solve for x
    x = 76,837.17/297.72
  6. Step 6: Final answer
    x = 258.09

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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.