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Finding the Fourth Proportional to 3,478.69, 5,218.02 and 881.62

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Solution

The fourth proportional to 3,478.69, 5,218.02 and 881.62 is: 1,322.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.69 : 5,218.02 = 881.62 : x
  2. Step 2: Convert to fraction form
    3,478.69/5,218.02 = 881.62/x
  3. Step 3: Cross multiply
    3,478.69x = 5,218.02 × 881.62
  4. Step 4: Simplify right side
    3,478.69x = 4,600,284.70
  5. Step 5: Solve for x
    x = 4,600,284.70/3,478.69
  6. Step 6: Final answer
    x = 1,322.42

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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.