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Finding the Fourth Proportional to 896.29, 1,339.22 and 648.31

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Solution

The fourth proportional to 896.29, 1,339.22 and 648.31 is: 968.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.29 : 1,339.22 = 648.31 : x
  2. Step 2: Convert to fraction form
    896.29/1,339.22 = 648.31/x
  3. Step 3: Cross multiply
    896.29x = 1,339.22 × 648.31
  4. Step 4: Simplify right side
    896.29x = 868,229.72
  5. Step 5: Solve for x
    x = 868,229.72/896.29
  6. Step 6: Final answer
    x = 968.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.