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Finding the Fourth Proportional to 494.44, 742.36 and 312.56

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Solution

The fourth proportional to 494.44, 742.36 and 312.56 is: 469.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.44 : 742.36 = 312.56 : x
  2. Step 2: Convert to fraction form
    494.44/742.36 = 312.56/x
  3. Step 3: Cross multiply
    494.44x = 742.36 × 312.56
  4. Step 4: Simplify right side
    494.44x = 232,032.04
  5. Step 5: Solve for x
    x = 232,032.04/494.44
  6. Step 6: Final answer
    x = 469.28

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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.