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Finding the Fourth Proportional to 323,906.30, 485,859.45 and 280,603.70

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Solution

The fourth proportional to 323,906.30, 485,859.45 and 280,603.70 is: 420,905.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,906.30 : 485,859.45 = 280,603.70 : x
  2. Step 2: Convert to fraction form
    323,906.30/485,859.45 = 280,603.70/x
  3. Step 3: Cross multiply
    323,906.30x = 485,859.45 × 280,603.70
  4. Step 4: Simplify right side
    323,906.30x = 136,333,959,349.97
  5. Step 5: Solve for x
    x = 136,333,959,349.97/323,906.30
  6. Step 6: Final answer
    x = 420,905.55

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1.5x scale

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.