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Finding the Fourth Proportional to 317.73, 438.45 and 177.85

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Solution

The fourth proportional to 317.73, 438.45 and 177.85 is: 245.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.73 : 438.45 = 177.85 : x
  2. Step 2: Convert to fraction form
    317.73/438.45 = 177.85/x
  3. Step 3: Cross multiply
    317.73x = 438.45 × 177.85
  4. Step 4: Simplify right side
    317.73x = 77,978.33
  5. Step 5: Solve for x
    x = 77,978.33/317.73
  6. Step 6: Final answer
    x = 245.42

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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.