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Finding the Fourth Proportional to 322.18, 444.36 and 318.16

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Solution

The fourth proportional to 322.18, 444.36 and 318.16 is: 438.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.18 : 444.36 = 318.16 : x
  2. Step 2: Convert to fraction form
    322.18/444.36 = 318.16/x
  3. Step 3: Cross multiply
    322.18x = 444.36 × 318.16
  4. Step 4: Simplify right side
    322.18x = 141,377.58
  5. Step 5: Solve for x
    x = 141,377.58/322.18
  6. Step 6: Final answer
    x = 438.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.