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Finding the Fourth Proportional to 243.77, 365.80 and 99.49

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Solution

The fourth proportional to 243.77, 365.80 and 99.49 is: 149.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.77 : 365.80 = 99.49 : x
  2. Step 2: Convert to fraction form
    243.77/365.80 = 99.49/x
  3. Step 3: Cross multiply
    243.77x = 365.80 × 99.49
  4. Step 4: Simplify right side
    243.77x = 36,393.44
  5. Step 5: Solve for x
    x = 36,393.44/243.77
  6. Step 6: Final answer
    x = 149.29

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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.