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Finding the Fourth Proportional to 633.72, 874.62 and 400.92

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Solution

The fourth proportional to 633.72, 874.62 and 400.92 is: 553.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.72 : 874.62 = 400.92 : x
  2. Step 2: Convert to fraction form
    633.72/874.62 = 400.92/x
  3. Step 3: Cross multiply
    633.72x = 874.62 × 400.92
  4. Step 4: Simplify right side
    633.72x = 350,652.65
  5. Step 5: Solve for x
    x = 350,652.65/633.72
  6. Step 6: Final answer
    x = 553.32

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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.