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Finding the Fourth Proportional to 2,045.36, 3,067.78 and 658.66

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Solution

The fourth proportional to 2,045.36, 3,067.78 and 658.66 is: 987.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,045.36 : 3,067.78 = 658.66 : x
  2. Step 2: Convert to fraction form
    2,045.36/3,067.78 = 658.66/x
  3. Step 3: Cross multiply
    2,045.36x = 3,067.78 × 658.66
  4. Step 4: Simplify right side
    2,045.36x = 2,020,632.89
  5. Step 5: Solve for x
    x = 2,020,632.89/2,045.36
  6. Step 6: Final answer
    x = 987.91

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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.