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Finding the Fourth Proportional to 174, 240.28 and 128.24

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Solution

The fourth proportional to 174, 240.28 and 128.24 is: 177.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    174 : 240.28 = 128.24 : x
  2. Step 2: Convert to fraction form
    174/240.28 = 128.24/x
  3. Step 3: Cross multiply
    174x = 240.28 × 128.24
  4. Step 4: Simplify right side
    174x = 30,813.51
  5. Step 5: Solve for x
    x = 30,813.51/174
  6. Step 6: Final answer
    x = 177.09

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1.5x scale

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.