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Finding the Fourth Proportional to 3,326.22, 4,989.33 and 860.88

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Solution

The fourth proportional to 3,326.22, 4,989.33 and 860.88 is: 1,291.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,326.22 : 4,989.33 = 860.88 : x
  2. Step 2: Convert to fraction form
    3,326.22/4,989.33 = 860.88/x
  3. Step 3: Cross multiply
    3,326.22x = 4,989.33 × 860.88
  4. Step 4: Simplify right side
    3,326.22x = 4,295,214.41
  5. Step 5: Solve for x
    x = 4,295,214.41/3,326.22
  6. Step 6: Final answer
    x = 1,291.32

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1.5x scale

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.