Home / 721,426.30-1,082,138.43-289,338.68

Finding the Fourth Proportional to 721,426.30, 1,082,138.43 and 289,338.68

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Solution

The fourth proportional to 721,426.30, 1,082,138.43 and 289,338.68 is: 434,007.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,426.30 : 1,082,138.43 = 289,338.68 : x
  2. Step 2: Convert to fraction form
    721,426.30/1,082,138.43 = 289,338.68/x
  3. Step 3: Cross multiply
    721,426.30x = 1,082,138.43 × 289,338.68
  4. Step 4: Simplify right side
    721,426.30x = 313,104,508,703.84
  5. Step 5: Solve for x
    x = 313,104,508,703.84/721,426.30
  6. Step 6: Final answer
    x = 434,007.62

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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.