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Finding the Third Proportional to 645,903 and 1,390,518

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Solution

The third proportional to 645,903 and 1,390,518 is: 2,993,545.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,903 : 1,390,518 = 1,390,518 : x
  2. Step 2: Convert to fraction form
    645,903/1,390,518 = 1,390,518/x
  3. Step 3: Cross multiply
    645,903x = 1,390,518 × 1,390,518
  4. Step 4: Simplify right side
    645,903x = 1,933,540,308,324
  5. Step 5: Solve for x
    x = 1,933,540,308,324/645,903
  6. Step 6: Final answer
    x = 2,993,545.95

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.