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Finding the Fourth Proportional to 3,279.16, 4,921.20 and 1,818.76

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Solution

The fourth proportional to 3,279.16, 4,921.20 and 1,818.76 is: 2,729.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279.16 : 4,921.20 = 1,818.76 : x
  2. Step 2: Convert to fraction form
    3,279.16/4,921.20 = 1,818.76/x
  3. Step 3: Cross multiply
    3,279.16x = 4,921.20 × 1,818.76
  4. Step 4: Simplify right side
    3,279.16x = 8,950,481.71
  5. Step 5: Solve for x
    x = 8,950,481.71/3,279.16
  6. Step 6: Final answer
    x = 2,729.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.