Home / 2,838.64-3,919.80-1,909.84

Finding the Fourth Proportional to 2,838.64, 3,919.80 and 1,909.84

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Solution

The fourth proportional to 2,838.64, 3,919.80 and 1,909.84 is: 2,637.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,838.64 : 3,919.80 = 1,909.84 : x
  2. Step 2: Convert to fraction form
    2,838.64/3,919.80 = 1,909.84/x
  3. Step 3: Cross multiply
    2,838.64x = 3,919.80 × 1,909.84
  4. Step 4: Simplify right side
    2,838.64x = 7,486,190.83
  5. Step 5: Solve for x
    x = 7,486,190.83/2,838.64
  6. Step 6: Final answer
    x = 2,637.25

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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.