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Finding the Fourth Proportional to 967.57, 1,451.21 and 318.30

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Solution

The fourth proportional to 967.57, 1,451.21 and 318.30 is: 477.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.57 : 1,451.21 = 318.30 : x
  2. Step 2: Convert to fraction form
    967.57/1,451.21 = 318.30/x
  3. Step 3: Cross multiply
    967.57x = 1,451.21 × 318.30
  4. Step 4: Simplify right side
    967.57x = 461,918.55
  5. Step 5: Solve for x
    x = 461,918.55/967.57
  6. Step 6: Final answer
    x = 477.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.