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Finding the Fourth Proportional to 633.76, 874.64 and 401.12

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Solution

The fourth proportional to 633.76, 874.64 and 401.12 is: 553.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.76 : 874.64 = 401.12 : x
  2. Step 2: Convert to fraction form
    633.76/874.64 = 401.12/x
  3. Step 3: Cross multiply
    633.76x = 874.64 × 401.12
  4. Step 4: Simplify right side
    633.76x = 350,835.60
  5. Step 5: Solve for x
    x = 350,835.60/633.76
  6. Step 6: Final answer
    x = 553.58

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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.