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Finding the Fourth Proportional to 407.67, 557.63 and 401.33

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Solution

The fourth proportional to 407.67, 557.63 and 401.33 is: 548.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.67 : 557.63 = 401.33 : x
  2. Step 2: Convert to fraction form
    407.67/557.63 = 401.33/x
  3. Step 3: Cross multiply
    407.67x = 557.63 × 401.33
  4. Step 4: Simplify right side
    407.67x = 223,788.85
  5. Step 5: Solve for x
    x = 223,788.85/407.67
  6. Step 6: Final answer
    x = 548.95

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.