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Finding the Fourth Proportional to 960.11, 1,440.16 and 635.40

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Solution

The fourth proportional to 960.11, 1,440.16 and 635.40 is: 953.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.11 : 1,440.16 = 635.40 : x
  2. Step 2: Convert to fraction form
    960.11/1,440.16 = 635.40/x
  3. Step 3: Cross multiply
    960.11x = 1,440.16 × 635.40
  4. Step 4: Simplify right side
    960.11x = 915,070.89
  5. Step 5: Solve for x
    x = 915,070.89/960.11
  6. Step 6: Final answer
    x = 953.09

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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.