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Finding the Fourth Proportional to 489,278.97, 675,204.76 and 285,290.50

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Solution

The fourth proportional to 489,278.97, 675,204.76 and 285,290.50 is: 393,700.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,278.97 : 675,204.76 = 285,290.50 : x
  2. Step 2: Convert to fraction form
    489,278.97/675,204.76 = 285,290.50/x
  3. Step 3: Cross multiply
    489,278.97x = 675,204.76 × 285,290.50
  4. Step 4: Simplify right side
    489,278.97x = 192,629,503,582.78
  5. Step 5: Solve for x
    x = 192,629,503,582.78/489,278.97
  6. Step 6: Final answer
    x = 393,700.76

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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.