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Finding the Fourth Proportional to 269.50, 371.81 and 151.45

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Solution

The fourth proportional to 269.50, 371.81 and 151.45 is: 208.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.50 : 371.81 = 151.45 : x
  2. Step 2: Convert to fraction form
    269.50/371.81 = 151.45/x
  3. Step 3: Cross multiply
    269.50x = 371.81 × 151.45
  4. Step 4: Simplify right side
    269.50x = 56,308.77
  5. Step 5: Solve for x
    x = 56,308.77/269.50
  6. Step 6: Final answer
    x = 208.94

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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.