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Finding the Fourth Proportional to 383.36, 529.26 and 272.81

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Solution

The fourth proportional to 383.36, 529.26 and 272.81 is: 376.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.36 : 529.26 = 272.81 : x
  2. Step 2: Convert to fraction form
    383.36/529.26 = 272.81/x
  3. Step 3: Cross multiply
    383.36x = 529.26 × 272.81
  4. Step 4: Simplify right side
    383.36x = 144,387.42
  5. Step 5: Solve for x
    x = 144,387.42/383.36
  6. Step 6: Final answer
    x = 376.64

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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.