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Finding the Fourth Proportional to 383.27, 528.56 and 257.52

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Solution

The fourth proportional to 383.27, 528.56 and 257.52 is: 355.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.27 : 528.56 = 257.52 : x
  2. Step 2: Convert to fraction form
    383.27/528.56 = 257.52/x
  3. Step 3: Cross multiply
    383.27x = 528.56 × 257.52
  4. Step 4: Simplify right side
    383.27x = 136,113.48
  5. Step 5: Solve for x
    x = 136,113.48/383.27
  6. Step 6: Final answer
    x = 355.14

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.