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Finding the Fourth Proportional to 443.18, 664.58 and 356.24

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Solution

The fourth proportional to 443.18, 664.58 and 356.24 is: 534.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.18 : 664.58 = 356.24 : x
  2. Step 2: Convert to fraction form
    443.18/664.58 = 356.24/x
  3. Step 3: Cross multiply
    443.18x = 664.58 × 356.24
  4. Step 4: Simplify right side
    443.18x = 236,749.98
  5. Step 5: Solve for x
    x = 236,749.98/443.18
  6. Step 6: Final answer
    x = 534.21

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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.