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Finding the Fourth Proportional to 423.91, 636.32 and 356.18

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Solution

The fourth proportional to 423.91, 636.32 and 356.18 is: 534.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.91 : 636.32 = 356.18 : x
  2. Step 2: Convert to fraction form
    423.91/636.32 = 356.18/x
  3. Step 3: Cross multiply
    423.91x = 636.32 × 356.18
  4. Step 4: Simplify right side
    423.91x = 226,644.46
  5. Step 5: Solve for x
    x = 226,644.46/423.91
  6. Step 6: Final answer
    x = 534.65

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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.