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Finding the Fourth Proportional to 547.92, 755.64 and 490.32

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Solution

The fourth proportional to 547.92, 755.64 and 490.32 is: 676.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.92 : 755.64 = 490.32 : x
  2. Step 2: Convert to fraction form
    547.92/755.64 = 490.32/x
  3. Step 3: Cross multiply
    547.92x = 755.64 × 490.32
  4. Step 4: Simplify right side
    547.92x = 370,505.40
  5. Step 5: Solve for x
    x = 370,505.40/547.92
  6. Step 6: Final answer
    x = 676.20

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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.