Home / 3,561.88-4,915.39-1,990.01

Finding the Fourth Proportional to 3,561.88, 4,915.39 and 1,990.01

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Solution

The fourth proportional to 3,561.88, 4,915.39 and 1,990.01 is: 2,746.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.88 : 4,915.39 = 1,990.01 : x
  2. Step 2: Convert to fraction form
    3,561.88/4,915.39 = 1,990.01/x
  3. Step 3: Cross multiply
    3,561.88x = 4,915.39 × 1,990.01
  4. Step 4: Simplify right side
    3,561.88x = 9,781,650.68
  5. Step 5: Solve for x
    x = 9,781,650.68/3,561.88
  6. Step 6: Final answer
    x = 2,746.21

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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.