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Finding the Fourth Proportional to 3,579, 5,367.84 and 981.60

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Solution

The fourth proportional to 3,579, 5,367.84 and 981.60 is: 1,472.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579 : 5,367.84 = 981.60 : x
  2. Step 2: Convert to fraction form
    3,579/5,367.84 = 981.60/x
  3. Step 3: Cross multiply
    3,579x = 5,367.84 × 981.60
  4. Step 4: Simplify right side
    3,579x = 5,269,071.74
  5. Step 5: Solve for x
    x = 5,269,071.74/3,579
  6. Step 6: Final answer
    x = 1,472.22

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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.