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Finding the Fourth Proportional to 3,661.20, 5,491.75 and 887.90

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Solution

The fourth proportional to 3,661.20, 5,491.75 and 887.90 is: 1,331.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,661.20 : 5,491.75 = 887.90 : x
  2. Step 2: Convert to fraction form
    3,661.20/5,491.75 = 887.90/x
  3. Step 3: Cross multiply
    3,661.20x = 5,491.75 × 887.90
  4. Step 4: Simplify right side
    3,661.20x = 4,876,096.81
  5. Step 5: Solve for x
    x = 4,876,096.81/3,661.20
  6. Step 6: Final answer
    x = 1,331.83

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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.