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Finding the Fourth Proportional to 1,778.76, 2,666.22 and 682.80

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Solution

The fourth proportional to 1,778.76, 2,666.22 and 682.80 is: 1,023.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.76 : 2,666.22 = 682.80 : x
  2. Step 2: Convert to fraction form
    1,778.76/2,666.22 = 682.80/x
  3. Step 3: Cross multiply
    1,778.76x = 2,666.22 × 682.80
  4. Step 4: Simplify right side
    1,778.76x = 1,820,495.02
  5. Step 5: Solve for x
    x = 1,820,495.02/1,778.76
  6. Step 6: Final answer
    x = 1,023.46

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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.