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Finding the Fourth Proportional to 317.29, 475.92 and 143.92

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Solution

The fourth proportional to 317.29, 475.92 and 143.92 is: 215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.29 : 475.92 = 143.92 : x
  2. Step 2: Convert to fraction form
    317.29/475.92 = 143.92/x
  3. Step 3: Cross multiply
    317.29x = 475.92 × 143.92
  4. Step 4: Simplify right side
    317.29x = 68,492.03
  5. Step 5: Solve for x
    x = 68,492.03/317.29
  6. Step 6: Final answer
    x = 215.87

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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.