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Finding the Fourth Proportional to 274,793, 379,214.34 and 155,561

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Solution

The fourth proportional to 274,793, 379,214.34 and 155,561 is: 214,674.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,793 : 379,214.34 = 155,561 : x
  2. Step 2: Convert to fraction form
    274,793/379,214.34 = 155,561/x
  3. Step 3: Cross multiply
    274,793x = 379,214.34 × 155,561
  4. Step 4: Simplify right side
    274,793x = 58,990,961,944.74
  5. Step 5: Solve for x
    x = 58,990,961,944.74/274,793
  6. Step 6: Final answer
    x = 214,674.18

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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.