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Finding the Third Proportional to 280,585 and 421,201.50

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Solution

The third proportional to 280,585 and 421,201.50 is: 632,288.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,585 : 421,201.50 = 421,201.50 : x
  2. Step 2: Convert to fraction form
    280,585/421,201.50 = 421,201.50/x
  3. Step 3: Cross multiply
    280,585x = 421,201.50 × 421,201.50
  4. Step 4: Simplify right side
    280,585x = 177,410,703,602.25
  5. Step 5: Solve for x
    x = 177,410,703,602.25/280,585
  6. Step 6: Final answer
    x = 632,288.62

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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.