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Finding the Fourth Proportional to 548.32, 756.21 and 488.58

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Solution

The fourth proportional to 548.32, 756.21 and 488.58 is: 673.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.32 : 756.21 = 488.58 : x
  2. Step 2: Convert to fraction form
    548.32/756.21 = 488.58/x
  3. Step 3: Cross multiply
    548.32x = 756.21 × 488.58
  4. Step 4: Simplify right side
    548.32x = 369,470.97
  5. Step 5: Solve for x
    x = 369,470.97/548.32
  6. Step 6: Final answer
    x = 673.82

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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.