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Finding the Fourth Proportional to 960.21, 1,324.45 and 628.04

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Solution

The fourth proportional to 960.21, 1,324.45 and 628.04 is: 866.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.21 : 1,324.45 = 628.04 : x
  2. Step 2: Convert to fraction form
    960.21/1,324.45 = 628.04/x
  3. Step 3: Cross multiply
    960.21x = 1,324.45 × 628.04
  4. Step 4: Simplify right side
    960.21x = 831,807.58
  5. Step 5: Solve for x
    x = 831,807.58/960.21
  6. Step 6: Final answer
    x = 866.28

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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.