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Finding the Third Proportional to 412,880 and 581,430

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Solution

The third proportional to 412,880 and 581,430 is: 818,787.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,880 : 581,430 = 581,430 : x
  2. Step 2: Convert to fraction form
    412,880/581,430 = 581,430/x
  3. Step 3: Cross multiply
    412,880x = 581,430 × 581,430
  4. Step 4: Simplify right side
    412,880x = 338,060,844,900
  5. Step 5: Solve for x
    x = 338,060,844,900/412,880
  6. Step 6: Final answer
    x = 818,787.17

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.