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Finding the Fourth Proportional to 1,668.88, 2,302.92 and 960.78

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Solution

The fourth proportional to 1,668.88, 2,302.92 and 960.78 is: 1,325.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668.88 : 2,302.92 = 960.78 : x
  2. Step 2: Convert to fraction form
    1,668.88/2,302.92 = 960.78/x
  3. Step 3: Cross multiply
    1,668.88x = 2,302.92 × 960.78
  4. Step 4: Simplify right side
    1,668.88x = 2,212,599.48
  5. Step 5: Solve for x
    x = 2,212,599.48/1,668.88
  6. Step 6: Final answer
    x = 1,325.80

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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.