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Finding the Third Proportional to 280,725 and 431,500

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Solution

The third proportional to 280,725 and 431,500 is: 663,254.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,725 : 431,500 = 431,500 : x
  2. Step 2: Convert to fraction form
    280,725/431,500 = 431,500/x
  3. Step 3: Cross multiply
    280,725x = 431,500 × 431,500
  4. Step 4: Simplify right side
    280,725x = 186,192,250,000
  5. Step 5: Solve for x
    x = 186,192,250,000/280,725
  6. Step 6: Final answer
    x = 663,254.96

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.