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Finding the Fourth Proportional to 316.06, 474.18 and 207.72

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Solution

The fourth proportional to 316.06, 474.18 and 207.72 is: 311.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.06 : 474.18 = 207.72 : x
  2. Step 2: Convert to fraction form
    316.06/474.18 = 207.72/x
  3. Step 3: Cross multiply
    316.06x = 474.18 × 207.72
  4. Step 4: Simplify right side
    316.06x = 98,496.67
  5. Step 5: Solve for x
    x = 98,496.67/316.06
  6. Step 6: Final answer
    x = 311.64

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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.