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Finding the Third Proportional to 180,408 and 256,434

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Solution

The third proportional to 180,408 and 256,434 is: 364,498.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,408 : 256,434 = 256,434 : x
  2. Step 2: Convert to fraction form
    180,408/256,434 = 256,434/x
  3. Step 3: Cross multiply
    180,408x = 256,434 × 256,434
  4. Step 4: Simplify right side
    180,408x = 65,758,396,356
  5. Step 5: Solve for x
    x = 65,758,396,356/180,408
  6. Step 6: Final answer
    x = 364,498.23

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.