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Finding the Fourth Proportional to 1,208.73, 1,668.13 and 677.66

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Solution

The fourth proportional to 1,208.73, 1,668.13 and 677.66 is: 935.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.73 : 1,668.13 = 677.66 : x
  2. Step 2: Convert to fraction form
    1,208.73/1,668.13 = 677.66/x
  3. Step 3: Cross multiply
    1,208.73x = 1,668.13 × 677.66
  4. Step 4: Simplify right side
    1,208.73x = 1,130,424.98
  5. Step 5: Solve for x
    x = 1,130,424.98/1,208.73
  6. Step 6: Final answer
    x = 935.22

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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.