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Finding the Fourth Proportional to 612.82, 921.24 and 475.92

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Solution

The fourth proportional to 612.82, 921.24 and 475.92 is: 715.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.82 : 921.24 = 475.92 : x
  2. Step 2: Convert to fraction form
    612.82/921.24 = 475.92/x
  3. Step 3: Cross multiply
    612.82x = 921.24 × 475.92
  4. Step 4: Simplify right side
    612.82x = 438,436.54
  5. Step 5: Solve for x
    x = 438,436.54/612.82
  6. Step 6: Final answer
    x = 715.44

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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.