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Finding the Fourth Proportional to 3,805.90, 5,708.80 and 1,340.71

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Solution

The fourth proportional to 3,805.90, 5,708.80 and 1,340.71 is: 2,011.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,805.90 : 5,708.80 = 1,340.71 : x
  2. Step 2: Convert to fraction form
    3,805.90/5,708.80 = 1,340.71/x
  3. Step 3: Cross multiply
    3,805.90x = 5,708.80 × 1,340.71
  4. Step 4: Simplify right side
    3,805.90x = 7,653,845.25
  5. Step 5: Solve for x
    x = 7,653,845.25/3,805.90
  6. Step 6: Final answer
    x = 2,011.05

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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.