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Finding the Third Proportional to 612.56 and 869.06

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Solution

The third proportional to 612.56 and 869.06 is: 1,232.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.56 : 869.06 = 869.06 : x
  2. Step 2: Convert to fraction form
    612.56/869.06 = 869.06/x
  3. Step 3: Cross multiply
    612.56x = 869.06 × 869.06
  4. Step 4: Simplify right side
    612.56x = 755,269.63
  5. Step 5: Solve for x
    x = 755,269.63/612.56
  6. Step 6: Final answer
    x = 1,232.97

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.