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Finding the Fourth Proportional to 403.27, 556.20 and 279.14

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Solution

The fourth proportional to 403.27, 556.20 and 279.14 is: 384.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.27 : 556.20 = 279.14 : x
  2. Step 2: Convert to fraction form
    403.27/556.20 = 279.14/x
  3. Step 3: Cross multiply
    403.27x = 556.20 × 279.14
  4. Step 4: Simplify right side
    403.27x = 155,255.93
  5. Step 5: Solve for x
    x = 155,255.93/403.27
  6. Step 6: Final answer
    x = 384.99

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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.