Home / 2,045.25-2,821.43-1,288.68

Finding the Fourth Proportional to 2,045.25, 2,821.43 and 1,288.68

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Solution

The fourth proportional to 2,045.25, 2,821.43 and 1,288.68 is: 1,777.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,045.25 : 2,821.43 = 1,288.68 : x
  2. Step 2: Convert to fraction form
    2,045.25/2,821.43 = 1,288.68/x
  3. Step 3: Cross multiply
    2,045.25x = 2,821.43 × 1,288.68
  4. Step 4: Simplify right side
    2,045.25x = 3,635,936.86
  5. Step 5: Solve for x
    x = 3,635,936.86/2,045.25
  6. Step 6: Final answer
    x = 1,777.75

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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.