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Finding the Third Proportional to 389 and 534.50

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Solution

The third proportional to 389 and 534.50 is: 734.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    389 : 534.50 = 534.50 : x
  2. Step 2: Convert to fraction form
    389/534.50 = 534.50/x
  3. Step 3: Cross multiply
    389x = 534.50 × 534.50
  4. Step 4: Simplify right side
    389x = 285,690.25
  5. Step 5: Solve for x
    x = 285,690.25/389
  6. Step 6: Final answer
    x = 734.42

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.