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Finding the Fourth Proportional to 960.78, 1,441.95 and 498.71

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Solution

The fourth proportional to 960.78, 1,441.95 and 498.71 is: 748.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.78 : 1,441.95 = 498.71 : x
  2. Step 2: Convert to fraction form
    960.78/1,441.95 = 498.71/x
  3. Step 3: Cross multiply
    960.78x = 1,441.95 × 498.71
  4. Step 4: Simplify right side
    960.78x = 719,107.67
  5. Step 5: Solve for x
    x = 719,107.67/960.78
  6. Step 6: Final answer
    x = 748.46

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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.