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Finding the Fourth Proportional to 489,859.28, 675,887.49 and 285,793.72

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Solution

The fourth proportional to 489,859.28, 675,887.49 and 285,793.72 is: 394,326.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,859.28 : 675,887.49 = 285,793.72 : x
  2. Step 2: Convert to fraction form
    489,859.28/675,887.49 = 285,793.72/x
  3. Step 3: Cross multiply
    489,859.28x = 675,887.49 × 285,793.72
  4. Step 4: Simplify right side
    489,859.28x = 193,164,398,378.84
  5. Step 5: Solve for x
    x = 193,164,398,378.84/489,859.28
  6. Step 6: Final answer
    x = 394,326.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.