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Finding the Fourth Proportional to 317.66, 476.65 and 178.75

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Solution

The fourth proportional to 317.66, 476.65 and 178.75 is: 268.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.66 : 476.65 = 178.75 : x
  2. Step 2: Convert to fraction form
    317.66/476.65 = 178.75/x
  3. Step 3: Cross multiply
    317.66x = 476.65 × 178.75
  4. Step 4: Simplify right side
    317.66x = 85,199.55
  5. Step 5: Solve for x
    x = 85,199.55/317.66
  6. Step 6: Final answer
    x = 268.21

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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.