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Finding the Fourth Proportional to 547.22, 755.28 and 358.42

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Solution

The fourth proportional to 547.22, 755.28 and 358.42 is: 494.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.22 : 755.28 = 358.42 : x
  2. Step 2: Convert to fraction form
    547.22/755.28 = 358.42/x
  3. Step 3: Cross multiply
    547.22x = 755.28 × 358.42
  4. Step 4: Simplify right side
    547.22x = 270,707.46
  5. Step 5: Solve for x
    x = 270,707.46/547.22
  6. Step 6: Final answer
    x = 494.70

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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.