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Finding the Fourth Proportional to 960.03, 1,440.05 and 411.87

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Solution

The fourth proportional to 960.03, 1,440.05 and 411.87 is: 617.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.03 : 1,440.05 = 411.87 : x
  2. Step 2: Convert to fraction form
    960.03/1,440.05 = 411.87/x
  3. Step 3: Cross multiply
    960.03x = 1,440.05 × 411.87
  4. Step 4: Simplify right side
    960.03x = 593,113.39
  5. Step 5: Solve for x
    x = 593,113.39/960.03
  6. Step 6: Final answer
    x = 617.81

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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.