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Finding the Fourth Proportional to 3,660.88, 5,491.30 and 887.55

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Solution

The fourth proportional to 3,660.88, 5,491.30 and 887.55 is: 1,331.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,660.88 : 5,491.30 = 887.55 : x
  2. Step 2: Convert to fraction form
    3,660.88/5,491.30 = 887.55/x
  3. Step 3: Cross multiply
    3,660.88x = 5,491.30 × 887.55
  4. Step 4: Simplify right side
    3,660.88x = 4,873,803.32
  5. Step 5: Solve for x
    x = 4,873,803.32/3,660.88
  6. Step 6: Final answer
    x = 1,331.32

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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.