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Finding the Fourth Proportional to 2,479.07, 3,718.70 and 747.69

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Solution

The fourth proportional to 2,479.07, 3,718.70 and 747.69 is: 1,121.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.07 : 3,718.70 = 747.69 : x
  2. Step 2: Convert to fraction form
    2,479.07/3,718.70 = 747.69/x
  3. Step 3: Cross multiply
    2,479.07x = 3,718.70 × 747.69
  4. Step 4: Simplify right side
    2,479.07x = 2,780,431.06
  5. Step 5: Solve for x
    x = 2,780,431.06/2,479.07
  6. Step 6: Final answer
    x = 1,121.56

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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.