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Finding the Fourth Proportional to 255.63, 385.59 and 240.66

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Solution

The fourth proportional to 255.63, 385.59 and 240.66 is: 363.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.63 : 385.59 = 240.66 : x
  2. Step 2: Convert to fraction form
    255.63/385.59 = 240.66/x
  3. Step 3: Cross multiply
    255.63x = 385.59 × 240.66
  4. Step 4: Simplify right side
    255.63x = 92,796.09
  5. Step 5: Solve for x
    x = 92,796.09/255.63
  6. Step 6: Final answer
    x = 363.01

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.