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Finding the Third Proportional to 639,289.50 and 992,551.50

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Solution

The third proportional to 639,289.50 and 992,551.50 is: 1,541,020.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,289.50 : 992,551.50 = 992,551.50 : x
  2. Step 2: Convert to fraction form
    639,289.50/992,551.50 = 992,551.50/x
  3. Step 3: Cross multiply
    639,289.50x = 992,551.50 × 992,551.50
  4. Step 4: Simplify right side
    639,289.50x = 985,158,480,152.25
  5. Step 5: Solve for x
    x = 985,158,480,152.25/639,289.50
  6. Step 6: Final answer
    x = 1,541,020.90

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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.