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Finding the Fourth Proportional to 633.24, 947.92 and 388.96

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Solution

The fourth proportional to 633.24, 947.92 and 388.96 is: 582.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.24 : 947.92 = 388.96 : x
  2. Step 2: Convert to fraction form
    633.24/947.92 = 388.96/x
  3. Step 3: Cross multiply
    633.24x = 947.92 × 388.96
  4. Step 4: Simplify right side
    633.24x = 368,702.96
  5. Step 5: Solve for x
    x = 368,702.96/633.24
  6. Step 6: Final answer
    x = 582.25

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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.