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Finding the Fourth Proportional to 401.38, 553.02 and 296.28

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Solution

The fourth proportional to 401.38, 553.02 and 296.28 is: 408.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.38 : 553.02 = 296.28 : x
  2. Step 2: Convert to fraction form
    401.38/553.02 = 296.28/x
  3. Step 3: Cross multiply
    401.38x = 553.02 × 296.28
  4. Step 4: Simplify right side
    401.38x = 163,848.77
  5. Step 5: Solve for x
    x = 163,848.77/401.38
  6. Step 6: Final answer
    x = 408.21

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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.