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Finding the Third Proportional to 287,149.50 and 422,430.75

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Solution

The third proportional to 287,149.50 and 422,430.75 is: 621,445.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,149.50 : 422,430.75 = 422,430.75 : x
  2. Step 2: Convert to fraction form
    287,149.50/422,430.75 = 422,430.75/x
  3. Step 3: Cross multiply
    287,149.50x = 422,430.75 × 422,430.75
  4. Step 4: Simplify right side
    287,149.50x = 178,447,738,545.56
  5. Step 5: Solve for x
    x = 178,447,738,545.56/287,149.50
  6. Step 6: Final answer
    x = 621,445.41

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.