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Finding the Fourth Proportional to 383.73, 529.56 and 215.71

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Solution

The fourth proportional to 383.73, 529.56 and 215.71 is: 297.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.73 : 529.56 = 215.71 : x
  2. Step 2: Convert to fraction form
    383.73/529.56 = 215.71/x
  3. Step 3: Cross multiply
    383.73x = 529.56 × 215.71
  4. Step 4: Simplify right side
    383.73x = 114,230.65
  5. Step 5: Solve for x
    x = 114,230.65/383.73
  6. Step 6: Final answer
    x = 297.69

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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.