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Finding the Fourth Proportional to 673,863.92, 929,939.16 and 372,057.20

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Solution

The fourth proportional to 673,863.92, 929,939.16 and 372,057.20 is: 513,442.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,863.92 : 929,939.16 = 372,057.20 : x
  2. Step 2: Convert to fraction form
    673,863.92/929,939.16 = 372,057.20/x
  3. Step 3: Cross multiply
    673,863.92x = 929,939.16 × 372,057.20
  4. Step 4: Simplify right side
    673,863.92x = 345,990,560,039.95
  5. Step 5: Solve for x
    x = 345,990,560,039.95/673,863.92
  6. Step 6: Final answer
    x = 513,442.77

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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.