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Finding the Fourth Proportional to 316.33, 474.29 and 207.79

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Solution

The fourth proportional to 316.33, 474.29 and 207.79 is: 311.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.33 : 474.29 = 207.79 : x
  2. Step 2: Convert to fraction form
    316.33/474.29 = 207.79/x
  3. Step 3: Cross multiply
    316.33x = 474.29 × 207.79
  4. Step 4: Simplify right side
    316.33x = 98,552.72
  5. Step 5: Solve for x
    x = 98,552.72/316.33
  6. Step 6: Final answer
    x = 311.55

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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.