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Finding the Fourth Proportional to 2,636.22, 3,954.90 and 787.19

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Solution

The fourth proportional to 2,636.22, 3,954.90 and 787.19 is: 1,180.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,636.22 : 3,954.90 = 787.19 : x
  2. Step 2: Convert to fraction form
    2,636.22/3,954.90 = 787.19/x
  3. Step 3: Cross multiply
    2,636.22x = 3,954.90 × 787.19
  4. Step 4: Simplify right side
    2,636.22x = 3,113,237.96
  5. Step 5: Solve for x
    x = 3,113,237.96/2,636.22
  6. Step 6: Final answer
    x = 1,180.95

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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.