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Finding the Fourth Proportional to 404.06, 557.60 and 220.06

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Solution

The fourth proportional to 404.06, 557.60 and 220.06 is: 303.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.06 : 557.60 = 220.06 : x
  2. Step 2: Convert to fraction form
    404.06/557.60 = 220.06/x
  3. Step 3: Cross multiply
    404.06x = 557.60 × 220.06
  4. Step 4: Simplify right side
    404.06x = 122,705.46
  5. Step 5: Solve for x
    x = 122,705.46/404.06
  6. Step 6: Final answer
    x = 303.68

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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.