Home / 3,890.70-5,366.78-2,491.02

Finding the Fourth Proportional to 3,890.70, 5,366.78 and 2,491.02

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Solution

The fourth proportional to 3,890.70, 5,366.78 and 2,491.02 is: 3,436.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.70 : 5,366.78 = 2,491.02 : x
  2. Step 2: Convert to fraction form
    3,890.70/5,366.78 = 2,491.02/x
  3. Step 3: Cross multiply
    3,890.70x = 5,366.78 × 2,491.02
  4. Step 4: Simplify right side
    3,890.70x = 13,368,756.32
  5. Step 5: Solve for x
    x = 13,368,756.32/3,890.70
  6. Step 6: Final answer
    x = 3,436.08

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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.