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Finding the Fourth Proportional to 255.88, 384.51 and 140.41

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Solution

The fourth proportional to 255.88, 384.51 and 140.41 is: 210.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.88 : 384.51 = 140.41 : x
  2. Step 2: Convert to fraction form
    255.88/384.51 = 140.41/x
  3. Step 3: Cross multiply
    255.88x = 384.51 × 140.41
  4. Step 4: Simplify right side
    255.88x = 53,989.05
  5. Step 5: Solve for x
    x = 53,989.05/255.88
  6. Step 6: Final answer
    x = 210.99

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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.