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Finding the Fourth Proportional to 3,123.91, 4,310.64 and 1,928.68

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Solution

The fourth proportional to 3,123.91, 4,310.64 and 1,928.68 is: 2,661.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.91 : 4,310.64 = 1,928.68 : x
  2. Step 2: Convert to fraction form
    3,123.91/4,310.64 = 1,928.68/x
  3. Step 3: Cross multiply
    3,123.91x = 4,310.64 × 1,928.68
  4. Step 4: Simplify right side
    3,123.91x = 8,313,845.16
  5. Step 5: Solve for x
    x = 8,313,845.16/3,123.91
  6. Step 6: Final answer
    x = 2,661.36

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1.5x scale

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.