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Finding the Fourth Proportional to 3,751.77, 5,177.72 and 2,158.90

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Solution

The fourth proportional to 3,751.77, 5,177.72 and 2,158.90 is: 2,979.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,751.77 : 5,177.72 = 2,158.90 : x
  2. Step 2: Convert to fraction form
    3,751.77/5,177.72 = 2,158.90/x
  3. Step 3: Cross multiply
    3,751.77x = 5,177.72 × 2,158.90
  4. Step 4: Simplify right side
    3,751.77x = 11,178,179.71
  5. Step 5: Solve for x
    x = 11,178,179.71/3,751.77
  6. Step 6: Final answer
    x = 2,979.44

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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.