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Finding the Fourth Proportional to 489,872.79, 676,023.95 and 275,013.27

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Solution

The fourth proportional to 489,872.79, 676,023.95 and 275,013.27 is: 379,518.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,872.79 : 676,023.95 = 275,013.27 : x
  2. Step 2: Convert to fraction form
    489,872.79/676,023.95 = 275,013.27/x
  3. Step 3: Cross multiply
    489,872.79x = 676,023.95 × 275,013.27
  4. Step 4: Simplify right side
    489,872.79x = 185,915,555,712.75
  5. Step 5: Solve for x
    x = 185,915,555,712.75/489,872.79
  6. Step 6: Final answer
    x = 379,518.03

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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.