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Finding the Fourth Proportional to 614.26, 920.81 and 285.23

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Solution

The fourth proportional to 614.26, 920.81 and 285.23 is: 427.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.26 : 920.81 = 285.23 : x
  2. Step 2: Convert to fraction form
    614.26/920.81 = 285.23/x
  3. Step 3: Cross multiply
    614.26x = 920.81 × 285.23
  4. Step 4: Simplify right side
    614.26x = 262,645.65
  5. Step 5: Solve for x
    x = 262,645.65/614.26
  6. Step 6: Final answer
    x = 427.58

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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.