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Finding the Fourth Proportional to 2,545.12, 3,818.04 and 813.34

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Solution

The fourth proportional to 2,545.12, 3,818.04 and 813.34 is: 1,220.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,545.12 : 3,818.04 = 813.34 : x
  2. Step 2: Convert to fraction form
    2,545.12/3,818.04 = 813.34/x
  3. Step 3: Cross multiply
    2,545.12x = 3,818.04 × 813.34
  4. Step 4: Simplify right side
    2,545.12x = 3,105,364.65
  5. Step 5: Solve for x
    x = 3,105,364.65/2,545.12
  6. Step 6: Final answer
    x = 1,220.13

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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.