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Finding the Fourth Proportional to 383.91, 574.15 and 340.85

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Solution

The fourth proportional to 383.91, 574.15 and 340.85 is: 509.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.91 : 574.15 = 340.85 : x
  2. Step 2: Convert to fraction form
    383.91/574.15 = 340.85/x
  3. Step 3: Cross multiply
    383.91x = 574.15 × 340.85
  4. Step 4: Simplify right side
    383.91x = 195,699.03
  5. Step 5: Solve for x
    x = 195,699.03/383.91
  6. Step 6: Final answer
    x = 509.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.