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Finding the Fourth Proportional to 490,338.92, 676,631.26 and 275,514.78

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Solution

The fourth proportional to 490,338.92, 676,631.26 and 275,514.78 is: 380,189.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,338.92 : 676,631.26 = 275,514.78 : x
  2. Step 2: Convert to fraction form
    490,338.92/676,631.26 = 275,514.78/x
  3. Step 3: Cross multiply
    490,338.92x = 676,631.26 × 275,514.78
  4. Step 4: Simplify right side
    490,338.92x = 186,421,912,740.02
  5. Step 5: Solve for x
    x = 186,421,912,740.02/490,338.92
  6. Step 6: Final answer
    x = 380,189.92

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1.5x scale

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.