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Finding the Fourth Proportional to 316.12, 474.18 and 207.98

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Solution

The fourth proportional to 316.12, 474.18 and 207.98 is: 311.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.12 : 474.18 = 207.98 : x
  2. Step 2: Convert to fraction form
    316.12/474.18 = 207.98/x
  3. Step 3: Cross multiply
    316.12x = 474.18 × 207.98
  4. Step 4: Simplify right side
    316.12x = 98,619.96
  5. Step 5: Solve for x
    x = 98,619.96/316.12
  6. Step 6: Final answer
    x = 311.97

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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.