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Finding the Fourth Proportional to 317.66, 476.41 and 135.19

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Solution

The fourth proportional to 317.66, 476.41 and 135.19 is: 202.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.66 : 476.41 = 135.19 : x
  2. Step 2: Convert to fraction form
    317.66/476.41 = 135.19/x
  3. Step 3: Cross multiply
    317.66x = 476.41 × 135.19
  4. Step 4: Simplify right side
    317.66x = 64,405.87
  5. Step 5: Solve for x
    x = 64,405.87/317.66
  6. Step 6: Final answer
    x = 202.75

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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.