Home / 1,872.91-2,806.53-1,438.75

Finding the Fourth Proportional to 1,872.91, 2,806.53 and 1,438.75

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Solution

The fourth proportional to 1,872.91, 2,806.53 and 1,438.75 is: 2,155.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.91 : 2,806.53 = 1,438.75 : x
  2. Step 2: Convert to fraction form
    1,872.91/2,806.53 = 1,438.75/x
  3. Step 3: Cross multiply
    1,872.91x = 2,806.53 × 1,438.75
  4. Step 4: Simplify right side
    1,872.91x = 4,037,895.04
  5. Step 5: Solve for x
    x = 4,037,895.04/1,872.91
  6. Step 6: Final answer
    x = 2,155.95

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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.