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Finding the Fourth Proportional to 673.84, 1,016.96 and 656.56

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Solution

The fourth proportional to 673.84, 1,016.96 and 656.56 is: 990.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.84 : 1,016.96 = 656.56 : x
  2. Step 2: Convert to fraction form
    673.84/1,016.96 = 656.56/x
  3. Step 3: Cross multiply
    673.84x = 1,016.96 × 656.56
  4. Step 4: Simplify right side
    673.84x = 667,695.26
  5. Step 5: Solve for x
    x = 667,695.26/673.84
  6. Step 6: Final answer
    x = 990.88

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.