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Finding the Fourth Proportional to 382.79, 528.35 and 235.55

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Solution

The fourth proportional to 382.79, 528.35 and 235.55 is: 325.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.79 : 528.35 = 235.55 : x
  2. Step 2: Convert to fraction form
    382.79/528.35 = 235.55/x
  3. Step 3: Cross multiply
    382.79x = 528.35 × 235.55
  4. Step 4: Simplify right side
    382.79x = 124,452.84
  5. Step 5: Solve for x
    x = 124,452.84/382.79
  6. Step 6: Final answer
    x = 325.12

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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.