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Finding the Fourth Proportional to 3,671.80, 5,508.78 and 1,479.40

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Solution

The fourth proportional to 3,671.80, 5,508.78 and 1,479.40 is: 2,219.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,671.80 : 5,508.78 = 1,479.40 : x
  2. Step 2: Convert to fraction form
    3,671.80/5,508.78 = 1,479.40/x
  3. Step 3: Cross multiply
    3,671.80x = 5,508.78 × 1,479.40
  4. Step 4: Simplify right side
    3,671.80x = 8,149,654.19
  5. Step 5: Solve for x
    x = 8,149,654.19/3,671.80
  6. Step 6: Final answer
    x = 2,219.53

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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.