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Finding the Third Proportional to 280,560 and 423,756

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Solution

The third proportional to 280,560 and 423,756 is: 640,038.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,560 : 423,756 = 423,756 : x
  2. Step 2: Convert to fraction form
    280,560/423,756 = 423,756/x
  3. Step 3: Cross multiply
    280,560x = 423,756 × 423,756
  4. Step 4: Simplify right side
    280,560x = 179,569,147,536
  5. Step 5: Solve for x
    x = 179,569,147,536/280,560
  6. Step 6: Final answer
    x = 640,038.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.