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Finding the Fourth Proportional to 553.70, 828.43 and 406.49

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Solution

The fourth proportional to 553.70, 828.43 and 406.49 is: 608.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.70 : 828.43 = 406.49 : x
  2. Step 2: Convert to fraction form
    553.70/828.43 = 406.49/x
  3. Step 3: Cross multiply
    553.70x = 828.43 × 406.49
  4. Step 4: Simplify right side
    553.70x = 336,743.35
  5. Step 5: Solve for x
    x = 336,743.35/553.70
  6. Step 6: Final answer
    x = 608.17

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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.