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Finding the Fourth Proportional to 269.23, 371.55 and 151.21

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Solution

The fourth proportional to 269.23, 371.55 and 151.21 is: 208.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.23 : 371.55 = 151.21 : x
  2. Step 2: Convert to fraction form
    269.23/371.55 = 151.21/x
  3. Step 3: Cross multiply
    269.23x = 371.55 × 151.21
  4. Step 4: Simplify right side
    269.23x = 56,182.08
  5. Step 5: Solve for x
    x = 56,182.08/269.23
  6. Step 6: Final answer
    x = 208.68

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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.