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Finding the Fourth Proportional to 1,808.05, 2,711.87 and 637.80

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Solution

The fourth proportional to 1,808.05, 2,711.87 and 637.80 is: 956.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,808.05 : 2,711.87 = 637.80 : x
  2. Step 2: Convert to fraction form
    1,808.05/2,711.87 = 637.80/x
  3. Step 3: Cross multiply
    1,808.05x = 2,711.87 × 637.80
  4. Step 4: Simplify right side
    1,808.05x = 1,729,627.50
  5. Step 5: Solve for x
    x = 1,729,627.50/1,808.05
  6. Step 6: Final answer
    x = 956.63

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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.