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Finding the Fourth Proportional to 255.64, 384.43 and 203.70

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Solution

The fourth proportional to 255.64, 384.43 and 203.70 is: 306.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.64 : 384.43 = 203.70 : x
  2. Step 2: Convert to fraction form
    255.64/384.43 = 203.70/x
  3. Step 3: Cross multiply
    255.64x = 384.43 × 203.70
  4. Step 4: Simplify right side
    255.64x = 78,310.02
  5. Step 5: Solve for x
    x = 78,310.02/255.64
  6. Step 6: Final answer
    x = 306.33

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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.