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Finding the Third Proportional to 199,989 and 310,068

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Solution

The third proportional to 199,989 and 310,068 is: 480,737.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,989 : 310,068 = 310,068 : x
  2. Step 2: Convert to fraction form
    199,989/310,068 = 310,068/x
  3. Step 3: Cross multiply
    199,989x = 310,068 × 310,068
  4. Step 4: Simplify right side
    199,989x = 96,142,164,624
  5. Step 5: Solve for x
    x = 96,142,164,624/199,989
  6. Step 6: Final answer
    x = 480,737.26

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.