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Finding the Fourth Proportional to 1,206.39, 1,664.77 and 851.94

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Solution

The fourth proportional to 1,206.39, 1,664.77 and 851.94 is: 1,175.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.39 : 1,664.77 = 851.94 : x
  2. Step 2: Convert to fraction form
    1,206.39/1,664.77 = 851.94/x
  3. Step 3: Cross multiply
    1,206.39x = 1,664.77 × 851.94
  4. Step 4: Simplify right side
    1,206.39x = 1,418,284.15
  5. Step 5: Solve for x
    x = 1,418,284.15/1,206.39
  6. Step 6: Final answer
    x = 1,175.64

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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.