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Finding the Third Proportional to 284,489 and 427,490

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Solution

The third proportional to 284,489 and 427,490 is: 642,371.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,489 : 427,490 = 427,490 : x
  2. Step 2: Convert to fraction form
    284,489/427,490 = 427,490/x
  3. Step 3: Cross multiply
    284,489x = 427,490 × 427,490
  4. Step 4: Simplify right side
    284,489x = 182,747,700,100
  5. Step 5: Solve for x
    x = 182,747,700,100/284,489
  6. Step 6: Final answer
    x = 642,371.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.