Home / 2,921.79-4,029.79-1,742.61

Finding the Fourth Proportional to 2,921.79, 4,029.79 and 1,742.61

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Solution

The fourth proportional to 2,921.79, 4,029.79 and 1,742.61 is: 2,403.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.79 : 4,029.79 = 1,742.61 : x
  2. Step 2: Convert to fraction form
    2,921.79/4,029.79 = 1,742.61/x
  3. Step 3: Cross multiply
    2,921.79x = 4,029.79 × 1,742.61
  4. Step 4: Simplify right side
    2,921.79x = 7,022,352.35
  5. Step 5: Solve for x
    x = 7,022,352.35/2,921.79
  6. Step 6: Final answer
    x = 2,403.44

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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.