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Finding the Fourth Proportional to 548.47, 755.43 and 423.93

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Solution

The fourth proportional to 548.47, 755.43 and 423.93 is: 583.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.47 : 755.43 = 423.93 : x
  2. Step 2: Convert to fraction form
    548.47/755.43 = 423.93/x
  3. Step 3: Cross multiply
    548.47x = 755.43 × 423.93
  4. Step 4: Simplify right side
    548.47x = 320,250.68
  5. Step 5: Solve for x
    x = 320,250.68/548.47
  6. Step 6: Final answer
    x = 583.90

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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.