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Finding the Fourth Proportional to 383.68, 572.18 and 335.20

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Solution

The fourth proportional to 383.68, 572.18 and 335.20 is: 499.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.68 : 572.18 = 335.20 : x
  2. Step 2: Convert to fraction form
    383.68/572.18 = 335.20/x
  3. Step 3: Cross multiply
    383.68x = 572.18 × 335.20
  4. Step 4: Simplify right side
    383.68x = 191,794.74
  5. Step 5: Solve for x
    x = 191,794.74/383.68
  6. Step 6: Final answer
    x = 499.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.