Home / 721,920.85-1,082,516.77-422,491.39

Finding the Fourth Proportional to 721,920.85, 1,082,516.77 and 422,491.39

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Solution

The fourth proportional to 721,920.85, 1,082,516.77 and 422,491.39 is: 633,523.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,920.85 : 1,082,516.77 = 422,491.39 : x
  2. Step 2: Convert to fraction form
    721,920.85/1,082,516.77 = 422,491.39/x
  3. Step 3: Cross multiply
    721,920.85x = 1,082,516.77 × 422,491.39
  4. Step 4: Simplify right side
    721,920.85x = 457,354,012,677.43
  5. Step 5: Solve for x
    x = 457,354,012,677.43/721,920.85
  6. Step 6: Final answer
    x = 633,523.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.