Home / 2,901.36-4,354.60-1,990

Finding the Fourth Proportional to 2,901.36, 4,354.60 and 1,990

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Solution

The fourth proportional to 2,901.36, 4,354.60 and 1,990 is: 2,986.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,901.36 : 4,354.60 = 1,990 : x
  2. Step 2: Convert to fraction form
    2,901.36/4,354.60 = 1,990/x
  3. Step 3: Cross multiply
    2,901.36x = 4,354.60 × 1,990
  4. Step 4: Simplify right side
    2,901.36x = 8,665,654
  5. Step 5: Solve for x
    x = 8,665,654/2,901.36
  6. Step 6: Final answer
    x = 2,986.76

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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.