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Finding the Fourth Proportional to 960.29, 1,325.45 and 680.57

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Solution

The fourth proportional to 960.29, 1,325.45 and 680.57 is: 939.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.29 : 1,325.45 = 680.57 : x
  2. Step 2: Convert to fraction form
    960.29/1,325.45 = 680.57/x
  3. Step 3: Cross multiply
    960.29x = 1,325.45 × 680.57
  4. Step 4: Simplify right side
    960.29x = 902,061.42
  5. Step 5: Solve for x
    x = 902,061.42/960.29
  6. Step 6: Final answer
    x = 939.36

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1.5x scale

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.