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Finding the Fourth Proportional to 3,326.13, 4,988.79 and 860.75

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Solution

The fourth proportional to 3,326.13, 4,988.79 and 860.75 is: 1,291.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,326.13 : 4,988.79 = 860.75 : x
  2. Step 2: Convert to fraction form
    3,326.13/4,988.79 = 860.75/x
  3. Step 3: Cross multiply
    3,326.13x = 4,988.79 × 860.75
  4. Step 4: Simplify right side
    3,326.13x = 4,294,076.05
  5. Step 5: Solve for x
    x = 4,294,076.05/3,326.13
  6. Step 6: Final answer
    x = 1,291.01

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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.