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Finding the Fourth Proportional to 315.89, 474.14 and 238.59

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Solution

The fourth proportional to 315.89, 474.14 and 238.59 is: 358.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.89 : 474.14 = 238.59 : x
  2. Step 2: Convert to fraction form
    315.89/474.14 = 238.59/x
  3. Step 3: Cross multiply
    315.89x = 474.14 × 238.59
  4. Step 4: Simplify right side
    315.89x = 113,123.88
  5. Step 5: Solve for x
    x = 113,123.88/315.89
  6. Step 6: Final answer
    x = 358.11

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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.