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Finding the Fourth Proportional to 2,379.95, 3,570.16 and 819.74

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Solution

The fourth proportional to 2,379.95, 3,570.16 and 819.74 is: 1,229.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,379.95 : 3,570.16 = 819.74 : x
  2. Step 2: Convert to fraction form
    2,379.95/3,570.16 = 819.74/x
  3. Step 3: Cross multiply
    2,379.95x = 3,570.16 × 819.74
  4. Step 4: Simplify right side
    2,379.95x = 2,926,609.83
  5. Step 5: Solve for x
    x = 2,926,609.83/2,379.95
  6. Step 6: Final answer
    x = 1,229.70

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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.