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Finding the Fourth Proportional to 318.18, 474.72 and 308.46

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Solution

The fourth proportional to 318.18, 474.72 and 308.46 is: 460.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.18 : 474.72 = 308.46 : x
  2. Step 2: Convert to fraction form
    318.18/474.72 = 308.46/x
  3. Step 3: Cross multiply
    318.18x = 474.72 × 308.46
  4. Step 4: Simplify right side
    318.18x = 146,432.13
  5. Step 5: Solve for x
    x = 146,432.13/318.18
  6. Step 6: Final answer
    x = 460.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.