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Finding the Fourth Proportional to 268.56, 405.18 and 255.06

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Solution

The fourth proportional to 268.56, 405.18 and 255.06 is: 384.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.56 : 405.18 = 255.06 : x
  2. Step 2: Convert to fraction form
    268.56/405.18 = 255.06/x
  3. Step 3: Cross multiply
    268.56x = 405.18 × 255.06
  4. Step 4: Simplify right side
    268.56x = 103,345.21
  5. Step 5: Solve for x
    x = 103,345.21/268.56
  6. Step 6: Final answer
    x = 384.81

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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.