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Finding the Fourth Proportional to 177.31, 244.68 and 128.31

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Solution

The fourth proportional to 177.31, 244.68 and 128.31 is: 177.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.31 : 244.68 = 128.31 : x
  2. Step 2: Convert to fraction form
    177.31/244.68 = 128.31/x
  3. Step 3: Cross multiply
    177.31x = 244.68 × 128.31
  4. Step 4: Simplify right side
    177.31x = 31,395.08
  5. Step 5: Solve for x
    x = 31,395.08/177.31
  6. Step 6: Final answer
    x = 177.06

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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.