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Finding the Fourth Proportional to 401.79, 602.21 and 170.34

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Solution

The fourth proportional to 401.79, 602.21 and 170.34 is: 255.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.79 : 602.21 = 170.34 : x
  2. Step 2: Convert to fraction form
    401.79/602.21 = 170.34/x
  3. Step 3: Cross multiply
    401.79x = 602.21 × 170.34
  4. Step 4: Simplify right side
    401.79x = 102,578.62
  5. Step 5: Solve for x
    x = 102,578.62/401.79
  6. Step 6: Final answer
    x = 255.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.