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Finding the Fourth Proportional to 239.48, 330.50 and 135.98

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Solution

The fourth proportional to 239.48, 330.50 and 135.98 is: 187.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.48 : 330.50 = 135.98 : x
  2. Step 2: Convert to fraction form
    239.48/330.50 = 135.98/x
  3. Step 3: Cross multiply
    239.48x = 330.50 × 135.98
  4. Step 4: Simplify right side
    239.48x = 44,941.39
  5. Step 5: Solve for x
    x = 44,941.39/239.48
  6. Step 6: Final answer
    x = 187.66

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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.