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Finding the Fourth Proportional to 249, 373.28 and 133.40

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Solution

The fourth proportional to 249, 373.28 and 133.40 is: 199.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    249 : 373.28 = 133.40 : x
  2. Step 2: Convert to fraction form
    249/373.28 = 133.40/x
  3. Step 3: Cross multiply
    249x = 373.28 × 133.40
  4. Step 4: Simplify right side
    249x = 49,793.02
  5. Step 5: Solve for x
    x = 49,793.02/249
  6. Step 6: Final answer
    x = 199.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.