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Finding the Fourth Proportional to 2,148.97, 3,223.95 and 668.11

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Solution

The fourth proportional to 2,148.97, 3,223.95 and 668.11 is: 1,002.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.97 : 3,223.95 = 668.11 : x
  2. Step 2: Convert to fraction form
    2,148.97/3,223.95 = 668.11/x
  3. Step 3: Cross multiply
    2,148.97x = 3,223.95 × 668.11
  4. Step 4: Simplify right side
    2,148.97x = 2,153,959.77
  5. Step 5: Solve for x
    x = 2,153,959.77/2,148.97
  6. Step 6: Final answer
    x = 1,002.32

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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.