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Finding the Third Proportional to 399,079 and 542,818

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Solution

The third proportional to 399,079 and 542,818 is: 738,328.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,079 : 542,818 = 542,818 : x
  2. Step 2: Convert to fraction form
    399,079/542,818 = 542,818/x
  3. Step 3: Cross multiply
    399,079x = 542,818 × 542,818
  4. Step 4: Simplify right side
    399,079x = 294,651,381,124
  5. Step 5: Solve for x
    x = 294,651,381,124/399,079
  6. Step 6: Final answer
    x = 738,328.45

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.