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Finding the Fourth Proportional to 405.52, 604.82 and 396.88

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Solution

The fourth proportional to 405.52, 604.82 and 396.88 is: 591.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.52 : 604.82 = 396.88 : x
  2. Step 2: Convert to fraction form
    405.52/604.82 = 396.88/x
  3. Step 3: Cross multiply
    405.52x = 604.82 × 396.88
  4. Step 4: Simplify right side
    405.52x = 240,040.96
  5. Step 5: Solve for x
    x = 240,040.96/405.52
  6. Step 6: Final answer
    x = 591.93

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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.