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Finding the Fourth Proportional to 417.99, 624.45 and 270.54

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Solution

The fourth proportional to 417.99, 624.45 and 270.54 is: 404.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.99 : 624.45 = 270.54 : x
  2. Step 2: Convert to fraction form
    417.99/624.45 = 270.54/x
  3. Step 3: Cross multiply
    417.99x = 624.45 × 270.54
  4. Step 4: Simplify right side
    417.99x = 168,939.72
  5. Step 5: Solve for x
    x = 168,939.72/417.99
  6. Step 6: Final answer
    x = 404.17

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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.