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Finding the Fourth Proportional to 2,388.99, 3,579.82 and 1,217.23

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Solution

The fourth proportional to 2,388.99, 3,579.82 and 1,217.23 is: 1,823.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,388.99 : 3,579.82 = 1,217.23 : x
  2. Step 2: Convert to fraction form
    2,388.99/3,579.82 = 1,217.23/x
  3. Step 3: Cross multiply
    2,388.99x = 3,579.82 × 1,217.23
  4. Step 4: Simplify right side
    2,388.99x = 4,357,464.30
  5. Step 5: Solve for x
    x = 4,357,464.30/2,388.99
  6. Step 6: Final answer
    x = 1,823.98

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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.