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Finding the Fourth Proportional to 423.15, 633.96 and 355.11

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Solution

The fourth proportional to 423.15, 633.96 and 355.11 is: 532.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.15 : 633.96 = 355.11 : x
  2. Step 2: Convert to fraction form
    423.15/633.96 = 355.11/x
  3. Step 3: Cross multiply
    423.15x = 633.96 × 355.11
  4. Step 4: Simplify right side
    423.15x = 225,125.54
  5. Step 5: Solve for x
    x = 225,125.54/423.15
  6. Step 6: Final answer
    x = 532.02

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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.