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Finding the Fourth Proportional to 2,168.98, 3,253.96 and 688.29

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Solution

The fourth proportional to 2,168.98, 3,253.96 and 688.29 is: 1,032.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,168.98 : 3,253.96 = 688.29 : x
  2. Step 2: Convert to fraction form
    2,168.98/3,253.96 = 688.29/x
  3. Step 3: Cross multiply
    2,168.98x = 3,253.96 × 688.29
  4. Step 4: Simplify right side
    2,168.98x = 2,239,668.13
  5. Step 5: Solve for x
    x = 2,239,668.13/2,168.98
  6. Step 6: Final answer
    x = 1,032.59

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1.5x scale

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.