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Finding the Fourth Proportional to 633.44, 874.48 and 400.80

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Solution

The fourth proportional to 633.44, 874.48 and 400.80 is: 553.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.44 : 874.48 = 400.80 : x
  2. Step 2: Convert to fraction form
    633.44/874.48 = 400.80/x
  3. Step 3: Cross multiply
    633.44x = 874.48 × 400.80
  4. Step 4: Simplify right side
    633.44x = 350,491.58
  5. Step 5: Solve for x
    x = 350,491.58/633.44
  6. Step 6: Final answer
    x = 553.31

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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.