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Finding the Third Proportional to 487,554 and 778,563

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Solution

The third proportional to 487,554 and 778,563 is: 1,243,268.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,554 : 778,563 = 778,563 : x
  2. Step 2: Convert to fraction form
    487,554/778,563 = 778,563/x
  3. Step 3: Cross multiply
    487,554x = 778,563 × 778,563
  4. Step 4: Simplify right side
    487,554x = 606,160,344,969
  5. Step 5: Solve for x
    x = 606,160,344,969/487,554
  6. Step 6: Final answer
    x = 1,243,268.12

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.