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Finding the Fourth Proportional to 401.56, 553.97 and 235.74

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Solution

The fourth proportional to 401.56, 553.97 and 235.74 is: 325.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.56 : 553.97 = 235.74 : x
  2. Step 2: Convert to fraction form
    401.56/553.97 = 235.74/x
  3. Step 3: Cross multiply
    401.56x = 553.97 × 235.74
  4. Step 4: Simplify right side
    401.56x = 130,595.55
  5. Step 5: Solve for x
    x = 130,595.55/401.56
  6. Step 6: Final answer
    x = 325.22

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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.