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Finding the Third Proportional to 489,787 and 742,074

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Solution

The third proportional to 489,787 and 742,074 is: 1,124,312.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,787 : 742,074 = 742,074 : x
  2. Step 2: Convert to fraction form
    489,787/742,074 = 742,074/x
  3. Step 3: Cross multiply
    489,787x = 742,074 × 742,074
  4. Step 4: Simplify right side
    489,787x = 550,673,821,476
  5. Step 5: Solve for x
    x = 550,673,821,476/489,787
  6. Step 6: Final answer
    x = 1,124,312.86

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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.