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Finding the Fourth Proportional to 174.90, 241.28 and 128.25

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Solution

The fourth proportional to 174.90, 241.28 and 128.25 is: 176.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.90 : 241.28 = 128.25 : x
  2. Step 2: Convert to fraction form
    174.90/241.28 = 128.25/x
  3. Step 3: Cross multiply
    174.90x = 241.28 × 128.25
  4. Step 4: Simplify right side
    174.90x = 30,944.16
  5. Step 5: Solve for x
    x = 30,944.16/174.90
  6. Step 6: Final answer
    x = 176.92

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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.