Home / 3,881.90-5,357.39-2,390.69

Finding the Fourth Proportional to 3,881.90, 5,357.39 and 2,390.69

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Solution

The fourth proportional to 3,881.90, 5,357.39 and 2,390.69 is: 3,299.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.90 : 5,357.39 = 2,390.69 : x
  2. Step 2: Convert to fraction form
    3,881.90/5,357.39 = 2,390.69/x
  3. Step 3: Cross multiply
    3,881.90x = 5,357.39 × 2,390.69
  4. Step 4: Simplify right side
    3,881.90x = 12,807,858.70
  5. Step 5: Solve for x
    x = 12,807,858.70/3,881.90
  6. Step 6: Final answer
    x = 3,299.38

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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.