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Finding the Fourth Proportional to 960.82, 1,439.88 and 549.34

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Solution

The fourth proportional to 960.82, 1,439.88 and 549.34 is: 823.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.82 : 1,439.88 = 549.34 : x
  2. Step 2: Convert to fraction form
    960.82/1,439.88 = 549.34/x
  3. Step 3: Cross multiply
    960.82x = 1,439.88 × 549.34
  4. Step 4: Simplify right side
    960.82x = 790,986.17
  5. Step 5: Solve for x
    x = 790,986.17/960.82
  6. Step 6: Final answer
    x = 823.24

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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.