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Finding the Fourth Proportional to 174.06, 260.68 and 128.29

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Solution

The fourth proportional to 174.06, 260.68 and 128.29 is: 192.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.06 : 260.68 = 128.29 : x
  2. Step 2: Convert to fraction form
    174.06/260.68 = 128.29/x
  3. Step 3: Cross multiply
    174.06x = 260.68 × 128.29
  4. Step 4: Simplify right side
    174.06x = 33,442.64
  5. Step 5: Solve for x
    x = 33,442.64/174.06
  6. Step 6: Final answer
    x = 192.13

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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.