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Finding the Fourth Proportional to 317.12, 475.36 and 274.24

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Solution

The fourth proportional to 317.12, 475.36 and 274.24 is: 411.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.12 : 475.36 = 274.24 : x
  2. Step 2: Convert to fraction form
    317.12/475.36 = 274.24/x
  3. Step 3: Cross multiply
    317.12x = 475.36 × 274.24
  4. Step 4: Simplify right side
    317.12x = 130,362.73
  5. Step 5: Solve for x
    x = 130,362.73/317.12
  6. Step 6: Final answer
    x = 411.08

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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.