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Finding the Fourth Proportional to 401.40, 601.60 and 228.21

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Solution

The fourth proportional to 401.40, 601.60 and 228.21 is: 342.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.40 : 601.60 = 228.21 : x
  2. Step 2: Convert to fraction form
    401.40/601.60 = 228.21/x
  3. Step 3: Cross multiply
    401.40x = 601.60 × 228.21
  4. Step 4: Simplify right side
    401.40x = 137,290.29
  5. Step 5: Solve for x
    x = 137,290.29/401.40
  6. Step 6: Final answer
    x = 342.03

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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.