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Finding the Fourth Proportional to 3,611.96, 4,984.71 and 2,120.31

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Solution

The fourth proportional to 3,611.96, 4,984.71 and 2,120.31 is: 2,926.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,611.96 : 4,984.71 = 2,120.31 : x
  2. Step 2: Convert to fraction form
    3,611.96/4,984.71 = 2,120.31/x
  3. Step 3: Cross multiply
    3,611.96x = 4,984.71 × 2,120.31
  4. Step 4: Simplify right side
    3,611.96x = 10,569,122.51
  5. Step 5: Solve for x
    x = 10,569,122.51/3,611.96
  6. Step 6: Final answer
    x = 2,926.15

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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.