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Finding the Third Proportional to 787,439 and 1,221,605

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Solution

The third proportional to 787,439 and 1,221,605 is: 1,895,154.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,439 : 1,221,605 = 1,221,605 : x
  2. Step 2: Convert to fraction form
    787,439/1,221,605 = 1,221,605/x
  3. Step 3: Cross multiply
    787,439x = 1,221,605 × 1,221,605
  4. Step 4: Simplify right side
    787,439x = 1,492,318,776,025
  5. Step 5: Solve for x
    x = 1,492,318,776,025/787,439
  6. Step 6: Final answer
    x = 1,895,154.77

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.