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Finding the Fourth Proportional to 3,890.43, 5,369.22 and 2,398.41

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Solution

The fourth proportional to 3,890.43, 5,369.22 and 2,398.41 is: 3,310.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.43 : 5,369.22 = 2,398.41 : x
  2. Step 2: Convert to fraction form
    3,890.43/5,369.22 = 2,398.41/x
  3. Step 3: Cross multiply
    3,890.43x = 5,369.22 × 2,398.41
  4. Step 4: Simplify right side
    3,890.43x = 12,877,590.94
  5. Step 5: Solve for x
    x = 12,877,590.94/3,890.43
  6. Step 6: Final answer
    x = 3,310.07

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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.