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Finding the Fourth Proportional to 548.08, 818.72 and 440.08

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Solution

The fourth proportional to 548.08, 818.72 and 440.08 is: 657.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.08 : 818.72 = 440.08 : x
  2. Step 2: Convert to fraction form
    548.08/818.72 = 440.08/x
  3. Step 3: Cross multiply
    548.08x = 818.72 × 440.08
  4. Step 4: Simplify right side
    548.08x = 360,302.30
  5. Step 5: Solve for x
    x = 360,302.30/548.08
  6. Step 6: Final answer
    x = 657.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.