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Finding the Fourth Proportional to 270.40, 407.22 and 238.25

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Solution

The fourth proportional to 270.40, 407.22 and 238.25 is: 358.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.40 : 407.22 = 238.25 : x
  2. Step 2: Convert to fraction form
    270.40/407.22 = 238.25/x
  3. Step 3: Cross multiply
    270.40x = 407.22 × 238.25
  4. Step 4: Simplify right side
    270.40x = 97,020.17
  5. Step 5: Solve for x
    x = 97,020.17/270.40
  6. Step 6: Final answer
    x = 358.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.