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Finding the Fourth Proportional to 548.48, 755.16 and 521.12

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Solution

The fourth proportional to 548.48, 755.16 and 521.12 is: 717.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.48 : 755.16 = 521.12 : x
  2. Step 2: Convert to fraction form
    548.48/755.16 = 521.12/x
  3. Step 3: Cross multiply
    548.48x = 755.16 × 521.12
  4. Step 4: Simplify right side
    548.48x = 393,528.98
  5. Step 5: Solve for x
    x = 393,528.98/548.48
  6. Step 6: Final answer
    x = 717.49

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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.