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Finding the Fourth Proportional to 401.15, 553.62 and 253.77

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Solution

The fourth proportional to 401.15, 553.62 and 253.77 is: 350.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.15 : 553.62 = 253.77 : x
  2. Step 2: Convert to fraction form
    401.15/553.62 = 253.77/x
  3. Step 3: Cross multiply
    401.15x = 553.62 × 253.77
  4. Step 4: Simplify right side
    401.15x = 140,492.15
  5. Step 5: Solve for x
    x = 140,492.15/401.15
  6. Step 6: Final answer
    x = 350.23

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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.