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Finding the Fourth Proportional to 4,479.67, 6,699.86 and 3,989.54

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Solution

The fourth proportional to 4,479.67, 6,699.86 and 3,989.54 is: 5,966.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,479.67 : 6,699.86 = 3,989.54 : x
  2. Step 2: Convert to fraction form
    4,479.67/6,699.86 = 3,989.54/x
  3. Step 3: Cross multiply
    4,479.67x = 6,699.86 × 3,989.54
  4. Step 4: Simplify right side
    4,479.67x = 26,729,306.02
  5. Step 5: Solve for x
    x = 26,729,306.02/4,479.67
  6. Step 6: Final answer
    x = 5,966.80

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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.