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Finding the Fourth Proportional to 4,620.69, 6,926.37 and 1,989.91

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Solution

The fourth proportional to 4,620.69, 6,926.37 and 1,989.91 is: 2,982.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,620.69 : 6,926.37 = 1,989.91 : x
  2. Step 2: Convert to fraction form
    4,620.69/6,926.37 = 1,989.91/x
  3. Step 3: Cross multiply
    4,620.69x = 6,926.37 × 1,989.91
  4. Step 4: Simplify right side
    4,620.69x = 13,782,854.12
  5. Step 5: Solve for x
    x = 13,782,854.12/4,620.69
  6. Step 6: Final answer
    x = 2,982.86

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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.