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Finding the Fourth Proportional to 401.58, 602.31 and 141.72

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Solution

The fourth proportional to 401.58, 602.31 and 141.72 is: 212.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.58 : 602.31 = 141.72 : x
  2. Step 2: Convert to fraction form
    401.58/602.31 = 141.72/x
  3. Step 3: Cross multiply
    401.58x = 602.31 × 141.72
  4. Step 4: Simplify right side
    401.58x = 85,359.37
  5. Step 5: Solve for x
    x = 85,359.37/401.58
  6. Step 6: Final answer
    x = 212.56

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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.