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Finding the Fourth Proportional to 618,717.92, 853,816.50 and 360,578.40

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Solution

The fourth proportional to 618,717.92, 853,816.50 and 360,578.40 is: 497,589.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,717.92 : 853,816.50 = 360,578.40 : x
  2. Step 2: Convert to fraction form
    618,717.92/853,816.50 = 360,578.40/x
  3. Step 3: Cross multiply
    618,717.92x = 853,816.50 × 360,578.40
  4. Step 4: Simplify right side
    618,717.92x = 307,867,787,463.60
  5. Step 5: Solve for x
    x = 307,867,787,463.60/618,717.92
  6. Step 6: Final answer
    x = 497,589.90

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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.