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Finding the Fourth Proportional to 401.81, 553.86 and 296.91

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Solution

The fourth proportional to 401.81, 553.86 and 296.91 is: 409.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.81 : 553.86 = 296.91 : x
  2. Step 2: Convert to fraction form
    401.81/553.86 = 296.91/x
  3. Step 3: Cross multiply
    401.81x = 553.86 × 296.91
  4. Step 4: Simplify right side
    401.81x = 164,446.57
  5. Step 5: Solve for x
    x = 164,446.57/401.81
  6. Step 6: Final answer
    x = 409.27

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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.