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Finding the Fourth Proportional to 442.36, 662.82 and 393.52

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Solution

The fourth proportional to 442.36, 662.82 and 393.52 is: 589.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.36 : 662.82 = 393.52 : x
  2. Step 2: Convert to fraction form
    442.36/662.82 = 393.52/x
  3. Step 3: Cross multiply
    442.36x = 662.82 × 393.52
  4. Step 4: Simplify right side
    442.36x = 260,832.93
  5. Step 5: Solve for x
    x = 260,832.93/442.36
  6. Step 6: Final answer
    x = 589.64

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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.