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Finding the Third Proportional to 670,128 and 1,020,987

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Solution

The third proportional to 670,128 and 1,020,987 is: 1,555,545.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,128 : 1,020,987 = 1,020,987 : x
  2. Step 2: Convert to fraction form
    670,128/1,020,987 = 1,020,987/x
  3. Step 3: Cross multiply
    670,128x = 1,020,987 × 1,020,987
  4. Step 4: Simplify right side
    670,128x = 1,042,414,454,169
  5. Step 5: Solve for x
    x = 1,042,414,454,169/670,128
  6. Step 6: Final answer
    x = 1,555,545.29

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.