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Finding the Third Proportional to 258.75 and 590.25

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Solution

The third proportional to 258.75 and 590.25 is: 1,346.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.75 : 590.25 = 590.25 : x
  2. Step 2: Convert to fraction form
    258.75/590.25 = 590.25/x
  3. Step 3: Cross multiply
    258.75x = 590.25 × 590.25
  4. Step 4: Simplify right side
    258.75x = 348,395.06
  5. Step 5: Solve for x
    x = 348,395.06/258.75
  6. Step 6: Final answer
    x = 1,346.45

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Why These Related Problems?

These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.