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Finding the Third Proportional to 621,708.75 and 988,609.50

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Solution

The third proportional to 621,708.75 and 988,609.50 is: 1,572,036.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,708.75 : 988,609.50 = 988,609.50 : x
  2. Step 2: Convert to fraction form
    621,708.75/988,609.50 = 988,609.50/x
  3. Step 3: Cross multiply
    621,708.75x = 988,609.50 × 988,609.50
  4. Step 4: Simplify right side
    621,708.75x = 977,348,743,490.25
  5. Step 5: Solve for x
    x = 977,348,743,490.25/621,708.75
  6. Step 6: Final answer
    x = 1,572,036.33

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.