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Finding the Third Proportional to 280,020 and 430,398

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Solution

The third proportional to 280,020 and 430,398 is: 661,532.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,020 : 430,398 = 430,398 : x
  2. Step 2: Convert to fraction form
    280,020/430,398 = 430,398/x
  3. Step 3: Cross multiply
    280,020x = 430,398 × 430,398
  4. Step 4: Simplify right side
    280,020x = 185,242,438,404
  5. Step 5: Solve for x
    x = 185,242,438,404/280,020
  6. Step 6: Final answer
    x = 661,532.88

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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.