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Finding the Fourth Proportional to 174.52, 239.81 and 157.72

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Solution

The fourth proportional to 174.52, 239.81 and 157.72 is: 216.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.52 : 239.81 = 157.72 : x
  2. Step 2: Convert to fraction form
    174.52/239.81 = 157.72/x
  3. Step 3: Cross multiply
    174.52x = 239.81 × 157.72
  4. Step 4: Simplify right side
    174.52x = 37,822.83
  5. Step 5: Solve for x
    x = 37,822.83/174.52
  6. Step 6: Final answer
    x = 216.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.