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Finding the Fourth Proportional to 3,487.94, 5,255.90 and 2,885.21

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Solution

The fourth proportional to 3,487.94, 5,255.90 and 2,885.21 is: 4,347.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.94 : 5,255.90 = 2,885.21 : x
  2. Step 2: Convert to fraction form
    3,487.94/5,255.90 = 2,885.21/x
  3. Step 3: Cross multiply
    3,487.94x = 5,255.90 × 2,885.21
  4. Step 4: Simplify right side
    3,487.94x = 15,164,375.24
  5. Step 5: Solve for x
    x = 15,164,375.24/3,487.94
  6. Step 6: Final answer
    x = 4,347.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.