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Finding the Third Proportional to 280,638 and 615,600

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Solution

The third proportional to 280,638 and 615,600 is: 1,350,363.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,638 : 615,600 = 615,600 : x
  2. Step 2: Convert to fraction form
    280,638/615,600 = 615,600/x
  3. Step 3: Cross multiply
    280,638x = 615,600 × 615,600
  4. Step 4: Simplify right side
    280,638x = 378,963,360,000
  5. Step 5: Solve for x
    x = 378,963,360,000/280,638
  6. Step 6: Final answer
    x = 1,350,363.67

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.