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Finding the Fourth Proportional to 1,806.68, 2,709.55 and 711.05

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Solution

The fourth proportional to 1,806.68, 2,709.55 and 711.05 is: 1,066.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,806.68 : 2,709.55 = 711.05 : x
  2. Step 2: Convert to fraction form
    1,806.68/2,709.55 = 711.05/x
  3. Step 3: Cross multiply
    1,806.68x = 2,709.55 × 711.05
  4. Step 4: Simplify right side
    1,806.68x = 1,926,625.53
  5. Step 5: Solve for x
    x = 1,926,625.53/1,806.68
  6. Step 6: Final answer
    x = 1,066.39

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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.