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Finding the Fourth Proportional to 317.30, 475.24 and 309.54

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Solution

The fourth proportional to 317.30, 475.24 and 309.54 is: 463.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.30 : 475.24 = 309.54 : x
  2. Step 2: Convert to fraction form
    317.30/475.24 = 309.54/x
  3. Step 3: Cross multiply
    317.30x = 475.24 × 309.54
  4. Step 4: Simplify right side
    317.30x = 147,105.79
  5. Step 5: Solve for x
    x = 147,105.79/317.30
  6. Step 6: Final answer
    x = 463.62

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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.