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Finding the Fourth Proportional to 613.18, 919.74 and 266.34

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Solution

The fourth proportional to 613.18, 919.74 and 266.34 is: 399.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.18 : 919.74 = 266.34 : x
  2. Step 2: Convert to fraction form
    613.18/919.74 = 266.34/x
  3. Step 3: Cross multiply
    613.18x = 919.74 × 266.34
  4. Step 4: Simplify right side
    613.18x = 244,963.55
  5. Step 5: Solve for x
    x = 244,963.55/613.18
  6. Step 6: Final answer
    x = 399.50

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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.