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Finding the Fourth Proportional to 383.79, 529.55 and 272.09

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Solution

The fourth proportional to 383.79, 529.55 and 272.09 is: 375.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.79 : 529.55 = 272.09 : x
  2. Step 2: Convert to fraction form
    383.79/529.55 = 272.09/x
  3. Step 3: Cross multiply
    383.79x = 529.55 × 272.09
  4. Step 4: Simplify right side
    383.79x = 144,085.26
  5. Step 5: Solve for x
    x = 144,085.26/383.79
  6. Step 6: Final answer
    x = 375.43

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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.