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Finding the Fourth Proportional to 3,391.40, 5,084.10 and 1,635.50

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Solution

The fourth proportional to 3,391.40, 5,084.10 and 1,635.50 is: 2,451.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.40 : 5,084.10 = 1,635.50 : x
  2. Step 2: Convert to fraction form
    3,391.40/5,084.10 = 1,635.50/x
  3. Step 3: Cross multiply
    3,391.40x = 5,084.10 × 1,635.50
  4. Step 4: Simplify right side
    3,391.40x = 8,315,045.55
  5. Step 5: Solve for x
    x = 8,315,045.55/3,391.40
  6. Step 6: Final answer
    x = 2,451.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.