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Finding the Fourth Proportional to 3,326.19, 4,989.19 and 860.92

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Solution

The fourth proportional to 3,326.19, 4,989.19 and 860.92 is: 1,291.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,326.19 : 4,989.19 = 860.92 : x
  2. Step 2: Convert to fraction form
    3,326.19/4,989.19 = 860.92/x
  3. Step 3: Cross multiply
    3,326.19x = 4,989.19 × 860.92
  4. Step 4: Simplify right side
    3,326.19x = 4,295,293.45
  5. Step 5: Solve for x
    x = 4,295,293.45/3,326.19
  6. Step 6: Final answer
    x = 1,291.36

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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.