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Finding the Fourth Proportional to 548, 753.28 and 481.76

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Solution

The fourth proportional to 548, 753.28 and 481.76 is: 662.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    548 : 753.28 = 481.76 : x
  2. Step 2: Convert to fraction form
    548/753.28 = 481.76/x
  3. Step 3: Cross multiply
    548x = 753.28 × 481.76
  4. Step 4: Simplify right side
    548x = 362,900.17
  5. Step 5: Solve for x
    x = 362,900.17/548
  6. Step 6: Final answer
    x = 662.23

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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.