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Finding the Fourth Proportional to 960.38, 1,440.60 and 412.18

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Solution

The fourth proportional to 960.38, 1,440.60 and 412.18 is: 618.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.38 : 1,440.60 = 412.18 : x
  2. Step 2: Convert to fraction form
    960.38/1,440.60 = 412.18/x
  3. Step 3: Cross multiply
    960.38x = 1,440.60 × 412.18
  4. Step 4: Simplify right side
    960.38x = 593,782.91
  5. Step 5: Solve for x
    x = 593,782.91/960.38
  6. Step 6: Final answer
    x = 618.28

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Double scale
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1.5x scale

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.