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Finding the Third Proportional to 558.75 and 742.50

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Solution

The third proportional to 558.75 and 742.50 is: 986.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.75 : 742.50 = 742.50 : x
  2. Step 2: Convert to fraction form
    558.75/742.50 = 742.50/x
  3. Step 3: Cross multiply
    558.75x = 742.50 × 742.50
  4. Step 4: Simplify right side
    558.75x = 551,306.25
  5. Step 5: Solve for x
    x = 551,306.25/558.75
  6. Step 6: Final answer
    x = 986.68

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.