Home / 1,439.87-1,984.95-1,107.77

Finding the Fourth Proportional to 1,439.87, 1,984.95 and 1,107.77

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Solution

The fourth proportional to 1,439.87, 1,984.95 and 1,107.77 is: 1,527.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.87 : 1,984.95 = 1,107.77 : x
  2. Step 2: Convert to fraction form
    1,439.87/1,984.95 = 1,107.77/x
  3. Step 3: Cross multiply
    1,439.87x = 1,984.95 × 1,107.77
  4. Step 4: Simplify right side
    1,439.87x = 2,198,858.14
  5. Step 5: Solve for x
    x = 2,198,858.14/1,439.87
  6. Step 6: Final answer
    x = 1,527.13

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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.