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Finding the Fourth Proportional to 553.48, 829.66 and 415.56

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Solution

The fourth proportional to 553.48, 829.66 and 415.56 is: 622.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.48 : 829.66 = 415.56 : x
  2. Step 2: Convert to fraction form
    553.48/829.66 = 415.56/x
  3. Step 3: Cross multiply
    553.48x = 829.66 × 415.56
  4. Step 4: Simplify right side
    553.48x = 344,773.51
  5. Step 5: Solve for x
    x = 344,773.51/553.48
  6. Step 6: Final answer
    x = 622.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.