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Finding the Fourth Proportional to 317.42, 438.04 and 177.56

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Solution

The fourth proportional to 317.42, 438.04 and 177.56 is: 245.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.42 : 438.04 = 177.56 : x
  2. Step 2: Convert to fraction form
    317.42/438.04 = 177.56/x
  3. Step 3: Cross multiply
    317.42x = 438.04 × 177.56
  4. Step 4: Simplify right side
    317.42x = 77,775.97
  5. Step 5: Solve for x
    x = 77,775.97/317.42
  6. Step 6: Final answer
    x = 245.02

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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.