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Finding the Fourth Proportional to 316.79, 474.57 and 154.38

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Solution

The fourth proportional to 316.79, 474.57 and 154.38 is: 231.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.79 : 474.57 = 154.38 : x
  2. Step 2: Convert to fraction form
    316.79/474.57 = 154.38/x
  3. Step 3: Cross multiply
    316.79x = 474.57 × 154.38
  4. Step 4: Simplify right side
    316.79x = 73,264.12
  5. Step 5: Solve for x
    x = 73,264.12/316.79
  6. Step 6: Final answer
    x = 231.27

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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.