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Finding the Fourth Proportional to 2,479.26, 3,718.99 and 813.48

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Solution

The fourth proportional to 2,479.26, 3,718.99 and 813.48 is: 1,220.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.26 : 3,718.99 = 813.48 : x
  2. Step 2: Convert to fraction form
    2,479.26/3,718.99 = 813.48/x
  3. Step 3: Cross multiply
    2,479.26x = 3,718.99 × 813.48
  4. Step 4: Simplify right side
    2,479.26x = 3,025,305.39
  5. Step 5: Solve for x
    x = 3,025,305.39/2,479.26
  6. Step 6: Final answer
    x = 1,220.25

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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.