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Finding the Fourth Proportional to 322.32, 486.12 and 318.66

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Solution

The fourth proportional to 322.32, 486.12 and 318.66 is: 480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.32 : 486.12 = 318.66 : x
  2. Step 2: Convert to fraction form
    322.32/486.12 = 318.66/x
  3. Step 3: Cross multiply
    322.32x = 486.12 × 318.66
  4. Step 4: Simplify right side
    322.32x = 154,907.00
  5. Step 5: Solve for x
    x = 154,907.00/322.32
  6. Step 6: Final answer
    x = 480.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.