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Finding the Fourth Proportional to 618,786.28, 853,872.90 and 343,152.04

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Solution

The fourth proportional to 618,786.28, 853,872.90 and 343,152.04 is: 473,520.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,786.28 : 853,872.90 = 343,152.04 : x
  2. Step 2: Convert to fraction form
    618,786.28/853,872.90 = 343,152.04/x
  3. Step 3: Cross multiply
    618,786.28x = 853,872.90 × 343,152.04
  4. Step 4: Simplify right side
    618,786.28x = 293,008,227,535.72
  5. Step 5: Solve for x
    x = 293,008,227,535.72/618,786.28
  6. Step 6: Final answer
    x = 473,520.89

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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.