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Finding the Fourth Proportional to 612.82, 917.27 and 338.23

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Solution

The fourth proportional to 612.82, 917.27 and 338.23 is: 506.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.82 : 917.27 = 338.23 : x
  2. Step 2: Convert to fraction form
    612.82/917.27 = 338.23/x
  3. Step 3: Cross multiply
    612.82x = 917.27 × 338.23
  4. Step 4: Simplify right side
    612.82x = 310,248.23
  5. Step 5: Solve for x
    x = 310,248.23/612.82
  6. Step 6: Final answer
    x = 506.26

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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.