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Finding the Fourth Proportional to 1,024.50, 1,536.78 and 255

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Solution

The fourth proportional to 1,024.50, 1,536.78 and 255 is: 382.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,024.50 : 1,536.78 = 255 : x
  2. Step 2: Convert to fraction form
    1,024.50/1,536.78 = 255/x
  3. Step 3: Cross multiply
    1,024.50x = 1,536.78 × 255
  4. Step 4: Simplify right side
    1,024.50x = 391,878.90
  5. Step 5: Solve for x
    x = 391,878.90/1,024.50
  6. Step 6: Final answer
    x = 382.51

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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.