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Finding the Fourth Proportional to 3,890.79, 5,836.19 and 1,699.25

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Solution

The fourth proportional to 3,890.79, 5,836.19 and 1,699.25 is: 2,548.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.79 : 5,836.19 = 1,699.25 : x
  2. Step 2: Convert to fraction form
    3,890.79/5,836.19 = 1,699.25/x
  3. Step 3: Cross multiply
    3,890.79x = 5,836.19 × 1,699.25
  4. Step 4: Simplify right side
    3,890.79x = 9,917,108.18
  5. Step 5: Solve for x
    x = 9,917,108.18/3,890.79
  6. Step 6: Final answer
    x = 2,548.87

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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.