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Finding the Fourth Proportional to 894.16, 1,340.96 and 688.96

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Solution

The fourth proportional to 894.16, 1,340.96 and 688.96 is: 1,033.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.16 : 1,340.96 = 688.96 : x
  2. Step 2: Convert to fraction form
    894.16/1,340.96 = 688.96/x
  3. Step 3: Cross multiply
    894.16x = 1,340.96 × 688.96
  4. Step 4: Simplify right side
    894.16x = 923,867.80
  5. Step 5: Solve for x
    x = 923,867.80/894.16
  6. Step 6: Final answer
    x = 1,033.22

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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.