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Finding the Fourth Proportional to 723,898.80, 998,979.96 and 397,213.96

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Solution

The fourth proportional to 723,898.80, 998,979.96 and 397,213.96 is: 548,155.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    723,898.80 : 998,979.96 = 397,213.96 : x
  2. Step 2: Convert to fraction form
    723,898.80/998,979.96 = 397,213.96/x
  3. Step 3: Cross multiply
    723,898.80x = 998,979.96 × 397,213.96
  4. Step 4: Simplify right side
    723,898.80x = 396,808,783,208.27
  5. Step 5: Solve for x
    x = 396,808,783,208.27/723,898.80
  6. Step 6: Final answer
    x = 548,155.05

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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.