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Finding the Fourth Proportional to 383.92, 530.08 and 236.80

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Solution

The fourth proportional to 383.92, 530.08 and 236.80 is: 326.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.92 : 530.08 = 236.80 : x
  2. Step 2: Convert to fraction form
    383.92/530.08 = 236.80/x
  3. Step 3: Cross multiply
    383.92x = 530.08 × 236.80
  4. Step 4: Simplify right side
    383.92x = 125,522.94
  5. Step 5: Solve for x
    x = 125,522.94/383.92
  6. Step 6: Final answer
    x = 326.95

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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.