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Finding the Fourth Proportional to 5,505.80, 7,601.46 and 3,939.08

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Solution

The fourth proportional to 5,505.80, 7,601.46 and 3,939.08 is: 5,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,505.80 : 7,601.46 = 3,939.08 : x
  2. Step 2: Convert to fraction form
    5,505.80/7,601.46 = 3,939.08/x
  3. Step 3: Cross multiply
    5,505.80x = 7,601.46 × 3,939.08
  4. Step 4: Simplify right side
    5,505.80x = 29,942,759.06
  5. Step 5: Solve for x
    x = 29,942,759.06/5,505.80
  6. Step 6: Final answer
    x = 5,438.40

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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.