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Finding the Fourth Proportional to 401.42, 553.96 and 235.60

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Solution

The fourth proportional to 401.42, 553.96 and 235.60 is: 325.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.42 : 553.96 = 235.60 : x
  2. Step 2: Convert to fraction form
    401.42/553.96 = 235.60/x
  3. Step 3: Cross multiply
    401.42x = 553.96 × 235.60
  4. Step 4: Simplify right side
    401.42x = 130,515.00
  5. Step 5: Solve for x
    x = 130,515.00/401.42
  6. Step 6: Final answer
    x = 325.13

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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.