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Finding the Fourth Proportional to 548.32, 757.64 and 438.70

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Solution

The fourth proportional to 548.32, 757.64 and 438.70 is: 606.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.32 : 757.64 = 438.70 : x
  2. Step 2: Convert to fraction form
    548.32/757.64 = 438.70/x
  3. Step 3: Cross multiply
    548.32x = 757.64 × 438.70
  4. Step 4: Simplify right side
    548.32x = 332,376.67
  5. Step 5: Solve for x
    x = 332,376.67/548.32
  6. Step 6: Final answer
    x = 606.17

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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.