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Finding the Third Proportional to 129,528 and 278,928

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Solution

The third proportional to 129,528 and 278,928 is: 600,648.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,528 : 278,928 = 278,928 : x
  2. Step 2: Convert to fraction form
    129,528/278,928 = 278,928/x
  3. Step 3: Cross multiply
    129,528x = 278,928 × 278,928
  4. Step 4: Simplify right side
    129,528x = 77,800,829,184
  5. Step 5: Solve for x
    x = 77,800,829,184/129,528
  6. Step 6: Final answer
    x = 600,648.73

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.