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Finding the Third Proportional to 487,418 and 1,128,289

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Solution

The third proportional to 487,418 and 1,128,289 is: 2,611,795.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,418 : 1,128,289 = 1,128,289 : x
  2. Step 2: Convert to fraction form
    487,418/1,128,289 = 1,128,289/x
  3. Step 3: Cross multiply
    487,418x = 1,128,289 × 1,128,289
  4. Step 4: Simplify right side
    487,418x = 1,273,036,067,521
  5. Step 5: Solve for x
    x = 1,273,036,067,521/487,418
  6. Step 6: Final answer
    x = 2,611,795.35

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.