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Finding the Third Proportional to 389.50 and 583.75

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Solution

The third proportional to 389.50 and 583.75 is: 874.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.50 : 583.75 = 583.75 : x
  2. Step 2: Convert to fraction form
    389.50/583.75 = 583.75/x
  3. Step 3: Cross multiply
    389.50x = 583.75 × 583.75
  4. Step 4: Simplify right side
    389.50x = 340,764.06
  5. Step 5: Solve for x
    x = 340,764.06/389.50
  6. Step 6: Final answer
    x = 874.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.