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Finding the Fourth Proportional to 358.40, 494.22 and 253.44

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Solution

The fourth proportional to 358.40, 494.22 and 253.44 is: 349.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.40 : 494.22 = 253.44 : x
  2. Step 2: Convert to fraction form
    358.40/494.22 = 253.44/x
  3. Step 3: Cross multiply
    358.40x = 494.22 × 253.44
  4. Step 4: Simplify right side
    358.40x = 125,255.12
  5. Step 5: Solve for x
    x = 125,255.12/358.40
  6. Step 6: Final answer
    x = 349.48

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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.