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Finding the Fourth Proportional to 383.84, 529.62 and 218.02

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Solution

The fourth proportional to 383.84, 529.62 and 218.02 is: 300.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.84 : 529.62 = 218.02 : x
  2. Step 2: Convert to fraction form
    383.84/529.62 = 218.02/x
  3. Step 3: Cross multiply
    383.84x = 529.62 × 218.02
  4. Step 4: Simplify right side
    383.84x = 115,467.75
  5. Step 5: Solve for x
    x = 115,467.75/383.84
  6. Step 6: Final answer
    x = 300.82

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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.