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Finding the Fourth Proportional to 522.44, 721.56 and 356.36

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Solution

The fourth proportional to 522.44, 721.56 and 356.36 is: 492.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.44 : 721.56 = 356.36 : x
  2. Step 2: Convert to fraction form
    522.44/721.56 = 356.36/x
  3. Step 3: Cross multiply
    522.44x = 721.56 × 356.36
  4. Step 4: Simplify right side
    522.44x = 257,135.12
  5. Step 5: Solve for x
    x = 257,135.12/522.44
  6. Step 6: Final answer
    x = 492.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.