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Finding the Fourth Proportional to 3,473.28, 4,789.80 and 3,218.76

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Solution

The fourth proportional to 3,473.28, 4,789.80 and 3,218.76 is: 4,438.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,473.28 : 4,789.80 = 3,218.76 : x
  2. Step 2: Convert to fraction form
    3,473.28/4,789.80 = 3,218.76/x
  3. Step 3: Cross multiply
    3,473.28x = 4,789.80 × 3,218.76
  4. Step 4: Simplify right side
    3,473.28x = 15,417,216.65
  5. Step 5: Solve for x
    x = 15,417,216.65/3,473.28
  6. Step 6: Final answer
    x = 4,438.81

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Half scale
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Double scale
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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.