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Finding the Fourth Proportional to 316.72, 474.81 and 134.11

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Solution

The fourth proportional to 316.72, 474.81 and 134.11 is: 201.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.72 : 474.81 = 134.11 : x
  2. Step 2: Convert to fraction form
    316.72/474.81 = 134.11/x
  3. Step 3: Cross multiply
    316.72x = 474.81 × 134.11
  4. Step 4: Simplify right side
    316.72x = 63,676.77
  5. Step 5: Solve for x
    x = 63,676.77/316.72
  6. Step 6: Final answer
    x = 201.05

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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.