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Finding the Third Proportional to 518,757 and 778,135.50

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Solution

The third proportional to 518,757 and 778,135.50 is: 1,167,203.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,757 : 778,135.50 = 778,135.50 : x
  2. Step 2: Convert to fraction form
    518,757/778,135.50 = 778,135.50/x
  3. Step 3: Cross multiply
    518,757x = 778,135.50 × 778,135.50
  4. Step 4: Simplify right side
    518,757x = 605,494,856,360.25
  5. Step 5: Solve for x
    x = 605,494,856,360.25/518,757
  6. Step 6: Final answer
    x = 1,167,203.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.