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Finding the Third Proportional to 239,479.88 and 399,117.38

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Solution

The third proportional to 239,479.88 and 399,117.38 is: 665,169.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,479.88 : 399,117.38 = 399,117.38 : x
  2. Step 2: Convert to fraction form
    239,479.88/399,117.38 = 399,117.38/x
  3. Step 3: Cross multiply
    239,479.88x = 399,117.38 × 399,117.38
  4. Step 4: Simplify right side
    239,479.88x = 159,294,679,026.89
  5. Step 5: Solve for x
    x = 159,294,679,026.89/239,479.88
  6. Step 6: Final answer
    x = 665,169.38

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Why These Related Problems?

These problems maintain the same ratio (1.67) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.