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Finding the Fourth Proportional to 2,636.24, 3,954.36 and 688.44

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Solution

The fourth proportional to 2,636.24, 3,954.36 and 688.44 is: 1,032.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,636.24 : 3,954.36 = 688.44 : x
  2. Step 2: Convert to fraction form
    2,636.24/3,954.36 = 688.44/x
  3. Step 3: Cross multiply
    2,636.24x = 3,954.36 × 688.44
  4. Step 4: Simplify right side
    2,636.24x = 2,722,339.60
  5. Step 5: Solve for x
    x = 2,722,339.60/2,636.24
  6. Step 6: Final answer
    x = 1,032.66

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1.5x scale

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.