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Finding the Fourth Proportional to 3,890.70, 5,836.05 and 969.00

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Solution

The fourth proportional to 3,890.70, 5,836.05 and 969.00 is: 1,453.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.70 : 5,836.05 = 969.00 : x
  2. Step 2: Convert to fraction form
    3,890.70/5,836.05 = 969.00/x
  3. Step 3: Cross multiply
    3,890.70x = 5,836.05 × 969.00
  4. Step 4: Simplify right side
    3,890.70x = 5,655,110.56
  5. Step 5: Solve for x
    x = 5,655,110.56/3,890.70
  6. Step 6: Final answer
    x = 1,453.49

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Similar ratio
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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.