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Finding the Fourth Proportional to 1,076.36, 1,612.58 and 858.33

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Solution

The fourth proportional to 1,076.36, 1,612.58 and 858.33 is: 1,285.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.36 : 1,612.58 = 858.33 : x
  2. Step 2: Convert to fraction form
    1,076.36/1,612.58 = 858.33/x
  3. Step 3: Cross multiply
    1,076.36x = 1,612.58 × 858.33
  4. Step 4: Simplify right side
    1,076.36x = 1,384,121.50
  5. Step 5: Solve for x
    x = 1,384,121.50/1,076.36
  6. Step 6: Final answer
    x = 1,285.93

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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.