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Finding the Third Proportional to 389.63 and 610.13

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Solution

The third proportional to 389.63 and 610.13 is: 955.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.63 : 610.13 = 610.13 : x
  2. Step 2: Convert to fraction form
    389.63/610.13 = 610.13/x
  3. Step 3: Cross multiply
    389.63x = 610.13 × 610.13
  4. Step 4: Simplify right side
    389.63x = 372,252.52
  5. Step 5: Solve for x
    x = 372,252.52/389.63
  6. Step 6: Final answer
    x = 955.41

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.