Home / 3,890.85-5,369.19-2,398.91

Finding the Fourth Proportional to 3,890.85, 5,369.19 and 2,398.91

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Solution

The fourth proportional to 3,890.85, 5,369.19 and 2,398.91 is: 3,310.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.85 : 5,369.19 = 2,398.91 : x
  2. Step 2: Convert to fraction form
    3,890.85/5,369.19 = 2,398.91/x
  3. Step 3: Cross multiply
    3,890.85x = 5,369.19 × 2,398.91
  4. Step 4: Simplify right side
    3,890.85x = 12,880,167.74
  5. Step 5: Solve for x
    x = 12,880,167.74/3,890.85
  6. Step 6: Final answer
    x = 3,310.38

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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.