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Finding the Fourth Proportional to 317.61, 476.31 and 112.17

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Solution

The fourth proportional to 317.61, 476.31 and 112.17 is: 168.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.61 : 476.31 = 112.17 : x
  2. Step 2: Convert to fraction form
    317.61/476.31 = 112.17/x
  3. Step 3: Cross multiply
    317.61x = 476.31 × 112.17
  4. Step 4: Simplify right side
    317.61x = 53,427.69
  5. Step 5: Solve for x
    x = 53,427.69/317.61
  6. Step 6: Final answer
    x = 168.22

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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.