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Finding the Fourth Proportional to 316.52, 474.24 and 188

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Solution

The fourth proportional to 316.52, 474.24 and 188 is: 281.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.52 : 474.24 = 188 : x
  2. Step 2: Convert to fraction form
    316.52/474.24 = 188/x
  3. Step 3: Cross multiply
    316.52x = 474.24 × 188
  4. Step 4: Simplify right side
    316.52x = 89,157.12
  5. Step 5: Solve for x
    x = 89,157.12/316.52
  6. Step 6: Final answer
    x = 281.68

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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.