Home / 2,439.38-3,366.26-1,391.40

Finding the Fourth Proportional to 2,439.38, 3,366.26 and 1,391.40

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Solution

The fourth proportional to 2,439.38, 3,366.26 and 1,391.40 is: 1,920.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,439.38 : 3,366.26 = 1,391.40 : x
  2. Step 2: Convert to fraction form
    2,439.38/3,366.26 = 1,391.40/x
  3. Step 3: Cross multiply
    2,439.38x = 3,366.26 × 1,391.40
  4. Step 4: Simplify right side
    2,439.38x = 4,683,814.16
  5. Step 5: Solve for x
    x = 4,683,814.16/2,439.38
  6. Step 6: Final answer
    x = 1,920.08

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1.5x scale

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.