Home / 2,887.78-3,985.05-1,628.91

Finding the Fourth Proportional to 2,887.78, 3,985.05 and 1,628.91

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Solution

The fourth proportional to 2,887.78, 3,985.05 and 1,628.91 is: 2,247.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.78 : 3,985.05 = 1,628.91 : x
  2. Step 2: Convert to fraction form
    2,887.78/3,985.05 = 1,628.91/x
  3. Step 3: Cross multiply
    2,887.78x = 3,985.05 × 1,628.91
  4. Step 4: Simplify right side
    2,887.78x = 6,491,287.80
  5. Step 5: Solve for x
    x = 6,491,287.80/2,887.78
  6. Step 6: Final answer
    x = 2,247.85

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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.