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Finding the Fourth Proportional to 415.17, 571.73 and 355.92

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Solution

The fourth proportional to 415.17, 571.73 and 355.92 is: 490.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.17 : 571.73 = 355.92 : x
  2. Step 2: Convert to fraction form
    415.17/571.73 = 355.92/x
  3. Step 3: Cross multiply
    415.17x = 571.73 × 355.92
  4. Step 4: Simplify right side
    415.17x = 203,490.14
  5. Step 5: Solve for x
    x = 203,490.14/415.17
  6. Step 6: Final answer
    x = 490.14

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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.