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Finding the Fourth Proportional to 495.21, 742.06 and 392.24

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Solution

The fourth proportional to 495.21, 742.06 and 392.24 is: 587.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.21 : 742.06 = 392.24 : x
  2. Step 2: Convert to fraction form
    495.21/742.06 = 392.24/x
  3. Step 3: Cross multiply
    495.21x = 742.06 × 392.24
  4. Step 4: Simplify right side
    495.21x = 291,067.96
  5. Step 5: Solve for x
    x = 291,067.96/495.21
  6. Step 6: Final answer
    x = 587.76

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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.