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Finding the Fourth Proportional to 403.99, 556.85 and 272.77

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Solution

The fourth proportional to 403.99, 556.85 and 272.77 is: 375.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.99 : 556.85 = 272.77 : x
  2. Step 2: Convert to fraction form
    403.99/556.85 = 272.77/x
  3. Step 3: Cross multiply
    403.99x = 556.85 × 272.77
  4. Step 4: Simplify right side
    403.99x = 151,891.97
  5. Step 5: Solve for x
    x = 151,891.97/403.99
  6. Step 6: Final answer
    x = 375.98

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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.