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Finding the Fourth Proportional to 401.04, 553.36 and 263.28

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Solution

The fourth proportional to 401.04, 553.36 and 263.28 is: 363.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.04 : 553.36 = 263.28 : x
  2. Step 2: Convert to fraction form
    401.04/553.36 = 263.28/x
  3. Step 3: Cross multiply
    401.04x = 553.36 × 263.28
  4. Step 4: Simplify right side
    401.04x = 145,688.62
  5. Step 5: Solve for x
    x = 145,688.62/401.04
  6. Step 6: Final answer
    x = 363.28

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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.