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Finding the Fourth Proportional to 2,572.95, 3,859.49 and 817.96

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Solution

The fourth proportional to 2,572.95, 3,859.49 and 817.96 is: 1,226.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.95 : 3,859.49 = 817.96 : x
  2. Step 2: Convert to fraction form
    2,572.95/3,859.49 = 817.96/x
  3. Step 3: Cross multiply
    2,572.95x = 3,859.49 × 817.96
  4. Step 4: Simplify right side
    2,572.95x = 3,156,908.44
  5. Step 5: Solve for x
    x = 3,156,908.44/2,572.95
  6. Step 6: Final answer
    x = 1,226.96

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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.