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Finding the Fourth Proportional to 613.13, 919.73 and 284.38

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Solution

The fourth proportional to 613.13, 919.73 and 284.38 is: 426.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.13 : 919.73 = 284.38 : x
  2. Step 2: Convert to fraction form
    613.13/919.73 = 284.38/x
  3. Step 3: Cross multiply
    613.13x = 919.73 × 284.38
  4. Step 4: Simplify right side
    613.13x = 261,549.10
  5. Step 5: Solve for x
    x = 261,549.10/613.13
  6. Step 6: Final answer
    x = 426.58

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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.