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Finding the Fourth Proportional to 1,208.66, 1,668.47 and 736.56

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Solution

The fourth proportional to 1,208.66, 1,668.47 and 736.56 is: 1,016.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.66 : 1,668.47 = 736.56 : x
  2. Step 2: Convert to fraction form
    1,208.66/1,668.47 = 736.56/x
  3. Step 3: Cross multiply
    1,208.66x = 1,668.47 × 736.56
  4. Step 4: Simplify right side
    1,208.66x = 1,228,924.58
  5. Step 5: Solve for x
    x = 1,228,924.58/1,208.66
  6. Step 6: Final answer
    x = 1,016.77

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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.