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Finding the Fourth Proportional to 316.18, 472.18 and 272.96

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Solution

The fourth proportional to 316.18, 472.18 and 272.96 is: 407.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.18 : 472.18 = 272.96 : x
  2. Step 2: Convert to fraction form
    316.18/472.18 = 272.96/x
  3. Step 3: Cross multiply
    316.18x = 472.18 × 272.96
  4. Step 4: Simplify right side
    316.18x = 128,884.83
  5. Step 5: Solve for x
    x = 128,884.83/316.18
  6. Step 6: Final answer
    x = 407.63

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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.