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Finding the Fourth Proportional to 633.80, 874.88 and 401.08

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Solution

The fourth proportional to 633.80, 874.88 and 401.08 is: 553.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.80 : 874.88 = 401.08 : x
  2. Step 2: Convert to fraction form
    633.80/874.88 = 401.08/x
  3. Step 3: Cross multiply
    633.80x = 874.88 × 401.08
  4. Step 4: Simplify right side
    633.80x = 350,896.87
  5. Step 5: Solve for x
    x = 350,896.87/633.80
  6. Step 6: Final answer
    x = 553.64

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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.