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Finding the Fourth Proportional to 403.50, 556.91 and 272.76

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Solution

The fourth proportional to 403.50, 556.91 and 272.76 is: 376.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.50 : 556.91 = 272.76 : x
  2. Step 2: Convert to fraction form
    403.50/556.91 = 272.76/x
  3. Step 3: Cross multiply
    403.50x = 556.91 × 272.76
  4. Step 4: Simplify right side
    403.50x = 151,902.77
  5. Step 5: Solve for x
    x = 151,902.77/403.50
  6. Step 6: Final answer
    x = 376.46

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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.