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Finding the Fourth Proportional to 2,399.77, 3,599.09 and 918.69

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Solution

The fourth proportional to 2,399.77, 3,599.09 and 918.69 is: 1,377.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,399.77 : 3,599.09 = 918.69 : x
  2. Step 2: Convert to fraction form
    2,399.77/3,599.09 = 918.69/x
  3. Step 3: Cross multiply
    2,399.77x = 3,599.09 × 918.69
  4. Step 4: Simplify right side
    2,399.77x = 3,306,447.99
  5. Step 5: Solve for x
    x = 3,306,447.99/2,399.77
  6. Step 6: Final answer
    x = 1,377.82

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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.