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Finding the Fourth Proportional to 1,778.73, 2,668.47 and 608.64

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Solution

The fourth proportional to 1,778.73, 2,668.47 and 608.64 is: 913.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.73 : 2,668.47 = 608.64 : x
  2. Step 2: Convert to fraction form
    1,778.73/2,668.47 = 608.64/x
  3. Step 3: Cross multiply
    1,778.73x = 2,668.47 × 608.64
  4. Step 4: Simplify right side
    1,778.73x = 1,624,137.58
  5. Step 5: Solve for x
    x = 1,624,137.58/1,778.73
  6. Step 6: Final answer
    x = 913.09

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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.