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Finding the Fourth Proportional to 548.87, 758.90 and 479.70

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Solution

The fourth proportional to 548.87, 758.90 and 479.70 is: 663.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.87 : 758.90 = 479.70 : x
  2. Step 2: Convert to fraction form
    548.87/758.90 = 479.70/x
  3. Step 3: Cross multiply
    548.87x = 758.90 × 479.70
  4. Step 4: Simplify right side
    548.87x = 364,043.73
  5. Step 5: Solve for x
    x = 364,043.73/548.87
  6. Step 6: Final answer
    x = 663.26

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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.