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Finding the Fourth Proportional to 2,219.71, 3,329.53 and 660.77

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Solution

The fourth proportional to 2,219.71, 3,329.53 and 660.77 is: 991.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,219.71 : 3,329.53 = 660.77 : x
  2. Step 2: Convert to fraction form
    2,219.71/3,329.53 = 660.77/x
  3. Step 3: Cross multiply
    2,219.71x = 3,329.53 × 660.77
  4. Step 4: Simplify right side
    2,219.71x = 2,200,035.24
  5. Step 5: Solve for x
    x = 2,200,035.24/2,219.71
  6. Step 6: Final answer
    x = 991.14

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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.