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Finding the Fourth Proportional to 317.12, 474.84 and 248.32

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Solution

The fourth proportional to 317.12, 474.84 and 248.32 is: 371.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.12 : 474.84 = 248.32 : x
  2. Step 2: Convert to fraction form
    317.12/474.84 = 248.32/x
  3. Step 3: Cross multiply
    317.12x = 474.84 × 248.32
  4. Step 4: Simplify right side
    317.12x = 117,912.27
  5. Step 5: Solve for x
    x = 117,912.27/317.12
  6. Step 6: Final answer
    x = 371.82

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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.