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Finding the Fourth Proportional to 2,479.55, 3,716.70 and 918.55

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Solution

The fourth proportional to 2,479.55, 3,716.70 and 918.55 is: 1,376.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.55 : 3,716.70 = 918.55 : x
  2. Step 2: Convert to fraction form
    2,479.55/3,716.70 = 918.55/x
  3. Step 3: Cross multiply
    2,479.55x = 3,716.70 × 918.55
  4. Step 4: Simplify right side
    2,479.55x = 3,413,974.79
  5. Step 5: Solve for x
    x = 3,413,974.79/2,479.55
  6. Step 6: Final answer
    x = 1,376.85

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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.