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Finding the Fourth Proportional to 613.10, 919.64 and 247.79

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Solution

The fourth proportional to 613.10, 919.64 and 247.79 is: 371.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.10 : 919.64 = 247.79 : x
  2. Step 2: Convert to fraction form
    613.10/919.64 = 247.79/x
  3. Step 3: Cross multiply
    613.10x = 919.64 × 247.79
  4. Step 4: Simplify right side
    613.10x = 227,873.00
  5. Step 5: Solve for x
    x = 227,873.00/613.10
  6. Step 6: Final answer
    x = 371.68

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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.