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Finding the Third Proportional to 399,114 and 602,817.75

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Solution

The third proportional to 399,114 and 602,817.75 is: 910,489.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,114 : 602,817.75 = 602,817.75 : x
  2. Step 2: Convert to fraction form
    399,114/602,817.75 = 602,817.75/x
  3. Step 3: Cross multiply
    399,114x = 602,817.75 × 602,817.75
  4. Step 4: Simplify right side
    399,114x = 363,389,239,715.06
  5. Step 5: Solve for x
    x = 363,389,239,715.06/399,114
  6. Step 6: Final answer
    x = 910,489.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.