Home / 3,123.80-4,689.30-1,892.60

Finding the Fourth Proportional to 3,123.80, 4,689.30 and 1,892.60

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Solution

The fourth proportional to 3,123.80, 4,689.30 and 1,892.60 is: 2,841.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.80 : 4,689.30 = 1,892.60 : x
  2. Step 2: Convert to fraction form
    3,123.80/4,689.30 = 1,892.60/x
  3. Step 3: Cross multiply
    3,123.80x = 4,689.30 × 1,892.60
  4. Step 4: Simplify right side
    3,123.80x = 8,874,969.18
  5. Step 5: Solve for x
    x = 8,874,969.18/3,123.80
  6. Step 6: Final answer
    x = 2,841.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.