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Finding the Fourth Proportional to 2,545.79, 3,818.74 and 814.42

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Solution

The fourth proportional to 2,545.79, 3,818.74 and 814.42 is: 1,221.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,545.79 : 3,818.74 = 814.42 : x
  2. Step 2: Convert to fraction form
    2,545.79/3,818.74 = 814.42/x
  3. Step 3: Cross multiply
    2,545.79x = 3,818.74 × 814.42
  4. Step 4: Simplify right side
    2,545.79x = 3,110,046.65
  5. Step 5: Solve for x
    x = 3,110,046.65/2,545.79
  6. Step 6: Final answer
    x = 1,221.64

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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.