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Finding the Fourth Proportional to 357.90, 536.58 and 255.12

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Solution

The fourth proportional to 357.90, 536.58 and 255.12 is: 382.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.90 : 536.58 = 255.12 : x
  2. Step 2: Convert to fraction form
    357.90/536.58 = 255.12/x
  3. Step 3: Cross multiply
    357.90x = 536.58 × 255.12
  4. Step 4: Simplify right side
    357.90x = 136,892.29
  5. Step 5: Solve for x
    x = 136,892.29/357.90
  6. Step 6: Final answer
    x = 382.49

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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.