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Finding the Fourth Proportional to 968.37, 1,450.90 and 639.11

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Solution

The fourth proportional to 968.37, 1,450.90 and 639.11 is: 957.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    968.37 : 1,450.90 = 639.11 : x
  2. Step 2: Convert to fraction form
    968.37/1,450.90 = 639.11/x
  3. Step 3: Cross multiply
    968.37x = 1,450.90 × 639.11
  4. Step 4: Simplify right side
    968.37x = 927,275.85
  5. Step 5: Solve for x
    x = 927,275.85/968.37
  6. Step 6: Final answer
    x = 957.56

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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.