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Finding the Fourth Proportional to 2,543.50, 3,815.20 and 694.46

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Solution

The fourth proportional to 2,543.50, 3,815.20 and 694.46 is: 1,041.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,543.50 : 3,815.20 = 694.46 : x
  2. Step 2: Convert to fraction form
    2,543.50/3,815.20 = 694.46/x
  3. Step 3: Cross multiply
    2,543.50x = 3,815.20 × 694.46
  4. Step 4: Simplify right side
    2,543.50x = 2,649,503.79
  5. Step 5: Solve for x
    x = 2,649,503.79/2,543.50
  6. Step 6: Final answer
    x = 1,041.68

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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.