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Finding the Fourth Proportional to 177.74, 245.24 and 158.15

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Solution

The fourth proportional to 177.74, 245.24 and 158.15 is: 218.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.74 : 245.24 = 158.15 : x
  2. Step 2: Convert to fraction form
    177.74/245.24 = 158.15/x
  3. Step 3: Cross multiply
    177.74x = 245.24 × 158.15
  4. Step 4: Simplify right side
    177.74x = 38,784.71
  5. Step 5: Solve for x
    x = 38,784.71/177.74
  6. Step 6: Final answer
    x = 218.21

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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.