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Finding the Third Proportional to 258.19 and 577.13

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Solution

The third proportional to 258.19 and 577.13 is: 1,290.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.19 : 577.13 = 577.13 : x
  2. Step 2: Convert to fraction form
    258.19/577.13 = 577.13/x
  3. Step 3: Cross multiply
    258.19x = 577.13 × 577.13
  4. Step 4: Simplify right side
    258.19x = 333,073.27
  5. Step 5: Solve for x
    x = 333,073.27/258.19
  6. Step 6: Final answer
    x = 1,290.04

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Why These Related Problems?

These problems maintain the same ratio (2.24) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.