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Finding the Fourth Proportional to 960.19, 1,439.17 and 549.52

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Solution

The fourth proportional to 960.19, 1,439.17 and 549.52 is: 823.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.19 : 1,439.17 = 549.52 : x
  2. Step 2: Convert to fraction form
    960.19/1,439.17 = 549.52/x
  3. Step 3: Cross multiply
    960.19x = 1,439.17 × 549.52
  4. Step 4: Simplify right side
    960.19x = 790,847.73
  5. Step 5: Solve for x
    x = 790,847.73/960.19
  6. Step 6: Final answer
    x = 823.64

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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.