Home / 2,985.94-4,121.00-1,806.78

Finding the Fourth Proportional to 2,985.94, 4,121.00 and 1,806.78

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Solution

The fourth proportional to 2,985.94, 4,121.00 and 1,806.78 is: 2,493.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.94 : 4,121.00 = 1,806.78 : x
  2. Step 2: Convert to fraction form
    2,985.94/4,121.00 = 1,806.78/x
  3. Step 3: Cross multiply
    2,985.94x = 4,121.00 × 1,806.78
  4. Step 4: Simplify right side
    2,985.94x = 7,445,753.58
  5. Step 5: Solve for x
    x = 7,445,753.58/2,985.94
  6. Step 6: Final answer
    x = 2,493.60

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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.