Home / 1,990.24-2,964.64-1,918.96

Finding the Fourth Proportional to 1,990.24, 2,964.64 and 1,918.96

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Solution

The fourth proportional to 1,990.24, 2,964.64 and 1,918.96 is: 2,858.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.24 : 2,964.64 = 1,918.96 : x
  2. Step 2: Convert to fraction form
    1,990.24/2,964.64 = 1,918.96/x
  3. Step 3: Cross multiply
    1,990.24x = 2,964.64 × 1,918.96
  4. Step 4: Simplify right side
    1,990.24x = 5,689,025.57
  5. Step 5: Solve for x
    x = 5,689,025.57/1,990.24
  6. Step 6: Final answer
    x = 2,858.46

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.