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Finding the Fourth Proportional to 1,206.54, 1,662.86 and 833.54

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Solution

The fourth proportional to 1,206.54, 1,662.86 and 833.54 is: 1,148.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.54 : 1,662.86 = 833.54 : x
  2. Step 2: Convert to fraction form
    1,206.54/1,662.86 = 833.54/x
  3. Step 3: Cross multiply
    1,206.54x = 1,662.86 × 833.54
  4. Step 4: Simplify right side
    1,206.54x = 1,386,054.09
  5. Step 5: Solve for x
    x = 1,386,054.09/1,206.54
  6. Step 6: Final answer
    x = 1,148.78

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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.