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Finding the Fourth Proportional to 283.10, 389.54 and 255.50

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Solution

The fourth proportional to 283.10, 389.54 and 255.50 is: 351.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.10 : 389.54 = 255.50 : x
  2. Step 2: Convert to fraction form
    283.10/389.54 = 255.50/x
  3. Step 3: Cross multiply
    283.10x = 389.54 × 255.50
  4. Step 4: Simplify right side
    283.10x = 99,527.47
  5. Step 5: Solve for x
    x = 99,527.47/283.10
  6. Step 6: Final answer
    x = 351.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.