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Finding the Fourth Proportional to 2,399.87, 3,596.99 and 918.11

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Solution

The fourth proportional to 2,399.87, 3,596.99 and 918.11 is: 1,376.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,399.87 : 3,596.99 = 918.11 : x
  2. Step 2: Convert to fraction form
    2,399.87/3,596.99 = 918.11/x
  3. Step 3: Cross multiply
    2,399.87x = 3,596.99 × 918.11
  4. Step 4: Simplify right side
    2,399.87x = 3,302,409.91
  5. Step 5: Solve for x
    x = 3,302,409.91/2,399.87
  6. Step 6: Final answer
    x = 1,376.08

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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.