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Finding the Fourth Proportional to 547.78, 755.64 and 348.25

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Solution

The fourth proportional to 547.78, 755.64 and 348.25 is: 480.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.78 : 755.64 = 348.25 : x
  2. Step 2: Convert to fraction form
    547.78/755.64 = 348.25/x
  3. Step 3: Cross multiply
    547.78x = 755.64 × 348.25
  4. Step 4: Simplify right side
    547.78x = 263,151.63
  5. Step 5: Solve for x
    x = 263,151.63/547.78
  6. Step 6: Final answer
    x = 480.40

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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.