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Finding the Fourth Proportional to 3,571.84, 4,928.80 and 2,079.28

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Solution

The fourth proportional to 3,571.84, 4,928.80 and 2,079.28 is: 2,869.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,571.84 : 4,928.80 = 2,079.28 : x
  2. Step 2: Convert to fraction form
    3,571.84/4,928.80 = 2,079.28/x
  3. Step 3: Cross multiply
    3,571.84x = 4,928.80 × 2,079.28
  4. Step 4: Simplify right side
    3,571.84x = 10,248,355.26
  5. Step 5: Solve for x
    x = 10,248,355.26/3,571.84
  6. Step 6: Final answer
    x = 2,869.21

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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.