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Finding the Fourth Proportional to 5,279.58, 7,286.19 and 2,921.82

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Solution

The fourth proportional to 5,279.58, 7,286.19 and 2,921.82 is: 4,032.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.58 : 7,286.19 = 2,921.82 : x
  2. Step 2: Convert to fraction form
    5,279.58/7,286.19 = 2,921.82/x
  3. Step 3: Cross multiply
    5,279.58x = 7,286.19 × 2,921.82
  4. Step 4: Simplify right side
    5,279.58x = 21,288,935.67
  5. Step 5: Solve for x
    x = 21,288,935.67/5,279.58
  6. Step 6: Final answer
    x = 4,032.32

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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.