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Finding the Fourth Proportional to 1,778.36, 2,666.12 and 682.43

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Solution

The fourth proportional to 1,778.36, 2,666.12 and 682.43 is: 1,023.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.36 : 2,666.12 = 682.43 : x
  2. Step 2: Convert to fraction form
    1,778.36/2,666.12 = 682.43/x
  3. Step 3: Cross multiply
    1,778.36x = 2,666.12 × 682.43
  4. Step 4: Simplify right side
    1,778.36x = 1,819,423.53
  5. Step 5: Solve for x
    x = 1,819,423.53/1,778.36
  6. Step 6: Final answer
    x = 1,023.09

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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.