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Finding the Fourth Proportional to 279,445.68, 386,085.96 and 194,940

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Solution

The fourth proportional to 279,445.68, 386,085.96 and 194,940 is: 269,331.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,445.68 : 386,085.96 = 194,940 : x
  2. Step 2: Convert to fraction form
    279,445.68/386,085.96 = 194,940/x
  3. Step 3: Cross multiply
    279,445.68x = 386,085.96 × 194,940
  4. Step 4: Simplify right side
    279,445.68x = 75,263,597,042.40
  5. Step 5: Solve for x
    x = 75,263,597,042.40/279,445.68
  6. Step 6: Final answer
    x = 269,331.76

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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.