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Finding the Fourth Proportional to 297.69, 410.78 and 187.13

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Solution

The fourth proportional to 297.69, 410.78 and 187.13 is: 258.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.69 : 410.78 = 187.13 : x
  2. Step 2: Convert to fraction form
    297.69/410.78 = 187.13/x
  3. Step 3: Cross multiply
    297.69x = 410.78 × 187.13
  4. Step 4: Simplify right side
    297.69x = 76,866.27
  5. Step 5: Solve for x
    x = 76,866.27/297.69
  6. Step 6: Final answer
    x = 258.21

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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.