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Finding the Fourth Proportional to 548.28, 753.48 and 493.61

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Solution

The fourth proportional to 548.28, 753.48 and 493.61 is: 678.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.28 : 753.48 = 493.61 : x
  2. Step 2: Convert to fraction form
    548.28/753.48 = 493.61/x
  3. Step 3: Cross multiply
    548.28x = 753.48 × 493.61
  4. Step 4: Simplify right side
    548.28x = 371,921.50
  5. Step 5: Solve for x
    x = 371,921.50/548.28
  6. Step 6: Final answer
    x = 678.34

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.