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Finding the Fourth Proportional to 383.84, 529.70 and 218.05

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Solution

The fourth proportional to 383.84, 529.70 and 218.05 is: 300.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.84 : 529.70 = 218.05 : x
  2. Step 2: Convert to fraction form
    383.84/529.70 = 218.05/x
  3. Step 3: Cross multiply
    383.84x = 529.70 × 218.05
  4. Step 4: Simplify right side
    383.84x = 115,501.09
  5. Step 5: Solve for x
    x = 115,501.09/383.84
  6. Step 6: Final answer
    x = 300.91

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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.