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Finding the Fourth Proportional to 318.71, 477.59 and 181.42

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Solution

The fourth proportional to 318.71, 477.59 and 181.42 is: 271.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.71 : 477.59 = 181.42 : x
  2. Step 2: Convert to fraction form
    318.71/477.59 = 181.42/x
  3. Step 3: Cross multiply
    318.71x = 477.59 × 181.42
  4. Step 4: Simplify right side
    318.71x = 86,642.28
  5. Step 5: Solve for x
    x = 86,642.28/318.71
  6. Step 6: Final answer
    x = 271.85

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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.