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Finding the Fourth Proportional to 467, 643.82 and 356.28

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Solution

The fourth proportional to 467, 643.82 and 356.28 is: 491.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    467 : 643.82 = 356.28 : x
  2. Step 2: Convert to fraction form
    467/643.82 = 356.28/x
  3. Step 3: Cross multiply
    467x = 643.82 × 356.28
  4. Step 4: Simplify right side
    467x = 229,380.19
  5. Step 5: Solve for x
    x = 229,380.19/467
  6. Step 6: Final answer
    x = 491.18

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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.