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Finding the Fourth Proportional to 255.43, 384.07 and 235.38

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Solution

The fourth proportional to 255.43, 384.07 and 235.38 is: 353.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.43 : 384.07 = 235.38 : x
  2. Step 2: Convert to fraction form
    255.43/384.07 = 235.38/x
  3. Step 3: Cross multiply
    255.43x = 384.07 × 235.38
  4. Step 4: Simplify right side
    255.43x = 90,402.40
  5. Step 5: Solve for x
    x = 90,402.40/255.43
  6. Step 6: Final answer
    x = 353.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.