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Finding the Fourth Proportional to 633.31, 947.11 and 485.11

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Solution

The fourth proportional to 633.31, 947.11 and 485.11 is: 725.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.31 : 947.11 = 485.11 : x
  2. Step 2: Convert to fraction form
    633.31/947.11 = 485.11/x
  3. Step 3: Cross multiply
    633.31x = 947.11 × 485.11
  4. Step 4: Simplify right side
    633.31x = 459,452.53
  5. Step 5: Solve for x
    x = 459,452.53/633.31
  6. Step 6: Final answer
    x = 725.48

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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.