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Finding the Fourth Proportional to 173.66, 260.58 and 128.38

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Solution

The fourth proportional to 173.66, 260.58 and 128.38 is: 192.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.66 : 260.58 = 128.38 : x
  2. Step 2: Convert to fraction form
    173.66/260.58 = 128.38/x
  3. Step 3: Cross multiply
    173.66x = 260.58 × 128.38
  4. Step 4: Simplify right side
    173.66x = 33,453.26
  5. Step 5: Solve for x
    x = 33,453.26/173.66
  6. Step 6: Final answer
    x = 192.64

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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.