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Finding the Fourth Proportional to 317.73, 476.79 and 135.12

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Solution

The fourth proportional to 317.73, 476.79 and 135.12 is: 202.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.73 : 476.79 = 135.12 : x
  2. Step 2: Convert to fraction form
    317.73/476.79 = 135.12/x
  3. Step 3: Cross multiply
    317.73x = 476.79 × 135.12
  4. Step 4: Simplify right side
    317.73x = 64,423.86
  5. Step 5: Solve for x
    x = 64,423.86/317.73
  6. Step 6: Final answer
    x = 202.76

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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.