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Finding the Third Proportional to 577.75 and 1,239.88

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Solution

The third proportional to 577.75 and 1,239.88 is: 2,660.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.75 : 1,239.88 = 1,239.88 : x
  2. Step 2: Convert to fraction form
    577.75/1,239.88 = 1,239.88/x
  3. Step 3: Cross multiply
    577.75x = 1,239.88 × 1,239.88
  4. Step 4: Simplify right side
    577.75x = 1,537,290.02
  5. Step 5: Solve for x
    x = 1,537,290.02/577.75
  6. Step 6: Final answer
    x = 2,660.82

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.