Home / 2,918.45-4,028.13-1,923.90

Finding the Fourth Proportional to 2,918.45, 4,028.13 and 1,923.90

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Solution

The fourth proportional to 2,918.45, 4,028.13 and 1,923.90 is: 2,655.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.45 : 4,028.13 = 1,923.90 : x
  2. Step 2: Convert to fraction form
    2,918.45/4,028.13 = 1,923.90/x
  3. Step 3: Cross multiply
    2,918.45x = 4,028.13 × 1,923.90
  4. Step 4: Simplify right side
    2,918.45x = 7,749,719.31
  5. Step 5: Solve for x
    x = 7,749,719.31/2,918.45
  6. Step 6: Final answer
    x = 2,655.43

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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.