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Finding the Third Proportional to 521.63 and 781.03

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Solution

The third proportional to 521.63 and 781.03 is: 1,169.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.63 : 781.03 = 781.03 : x
  2. Step 2: Convert to fraction form
    521.63/781.03 = 781.03/x
  3. Step 3: Cross multiply
    521.63x = 781.03 × 781.03
  4. Step 4: Simplify right side
    521.63x = 610,009.81
  5. Step 5: Solve for x
    x = 610,009.81/521.63
  6. Step 6: Final answer
    x = 1,169.44

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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.