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Finding the Fourth Proportional to 618,783.28, 853,868.76 and 343,149.04

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Solution

The fourth proportional to 618,783.28, 853,868.76 and 343,149.04 is: 473,516.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,783.28 : 853,868.76 = 343,149.04 : x
  2. Step 2: Convert to fraction form
    618,783.28/853,868.76 = 343,149.04/x
  3. Step 3: Cross multiply
    618,783.28x = 853,868.76 × 343,149.04
  4. Step 4: Simplify right side
    618,783.28x = 293,004,245,279.99
  5. Step 5: Solve for x
    x = 293,004,245,279.99/618,783.28
  6. Step 6: Final answer
    x = 473,516.75

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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.