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Finding the Fourth Proportional to 1,772.69, 2,658.41 and 677.36

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Solution

The fourth proportional to 1,772.69, 2,658.41 and 677.36 is: 1,015.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.69 : 2,658.41 = 677.36 : x
  2. Step 2: Convert to fraction form
    1,772.69/2,658.41 = 677.36/x
  3. Step 3: Cross multiply
    1,772.69x = 2,658.41 × 677.36
  4. Step 4: Simplify right side
    1,772.69x = 1,800,700.60
  5. Step 5: Solve for x
    x = 1,800,700.60/1,772.69
  6. Step 6: Final answer
    x = 1,015.80

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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.