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Finding the Fourth Proportional to 383.80, 529.66 and 228.52

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Solution

The fourth proportional to 383.80, 529.66 and 228.52 is: 315.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.80 : 529.66 = 228.52 : x
  2. Step 2: Convert to fraction form
    383.80/529.66 = 228.52/x
  3. Step 3: Cross multiply
    383.80x = 529.66 × 228.52
  4. Step 4: Simplify right side
    383.80x = 121,037.90
  5. Step 5: Solve for x
    x = 121,037.90/383.80
  6. Step 6: Final answer
    x = 315.37

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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.