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Finding the Third Proportional to 287,998.88 and 620,149.50

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Solution

The third proportional to 287,998.88 and 620,149.50 is: 1,335,371.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,998.88 : 620,149.50 = 620,149.50 : x
  2. Step 2: Convert to fraction form
    287,998.88/620,149.50 = 620,149.50/x
  3. Step 3: Cross multiply
    287,998.88x = 620,149.50 × 620,149.50
  4. Step 4: Simplify right side
    287,998.88x = 384,585,402,350.25
  5. Step 5: Solve for x
    x = 384,585,402,350.25/287,998.88
  6. Step 6: Final answer
    x = 1,335,371.20

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.