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Finding the Fourth Proportional to 3,948.03, 5,437.20 and 3,861.91

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Solution

The fourth proportional to 3,948.03, 5,437.20 and 3,861.91 is: 5,318.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,948.03 : 5,437.20 = 3,861.91 : x
  2. Step 2: Convert to fraction form
    3,948.03/5,437.20 = 3,861.91/x
  3. Step 3: Cross multiply
    3,948.03x = 5,437.20 × 3,861.91
  4. Step 4: Simplify right side
    3,948.03x = 20,997,977.05
  5. Step 5: Solve for x
    x = 20,997,977.05/3,948.03
  6. Step 6: Final answer
    x = 5,318.60

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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.