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Finding the Fourth Proportional to 3,188, 4,399.72 and 1,790.76

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Solution

The fourth proportional to 3,188, 4,399.72 and 1,790.76 is: 2,471.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,188 : 4,399.72 = 1,790.76 : x
  2. Step 2: Convert to fraction form
    3,188/4,399.72 = 1,790.76/x
  3. Step 3: Cross multiply
    3,188x = 4,399.72 × 1,790.76
  4. Step 4: Simplify right side
    3,188x = 7,878,842.59
  5. Step 5: Solve for x
    x = 7,878,842.59/3,188
  6. Step 6: Final answer
    x = 2,471.41

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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.