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Finding the Fourth Proportional to 483.50, 667.29 and 318.19

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Solution

The fourth proportional to 483.50, 667.29 and 318.19 is: 439.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.50 : 667.29 = 318.19 : x
  2. Step 2: Convert to fraction form
    483.50/667.29 = 318.19/x
  3. Step 3: Cross multiply
    483.50x = 667.29 × 318.19
  4. Step 4: Simplify right side
    483.50x = 212,323.34
  5. Step 5: Solve for x
    x = 212,323.34/483.50
  6. Step 6: Final answer
    x = 439.14

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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.