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Finding the Fourth Proportional to 317.16, 475.23 and 208.75

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Solution

The fourth proportional to 317.16, 475.23 and 208.75 is: 312.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.16 : 475.23 = 208.75 : x
  2. Step 2: Convert to fraction form
    317.16/475.23 = 208.75/x
  3. Step 3: Cross multiply
    317.16x = 475.23 × 208.75
  4. Step 4: Simplify right side
    317.16x = 99,204.26
  5. Step 5: Solve for x
    x = 99,204.26/317.16
  6. Step 6: Final answer
    x = 312.79

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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.