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Finding the Fourth Proportional to 2,612.45, 3,915.95 and 967.95

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Solution

The fourth proportional to 2,612.45, 3,915.95 and 967.95 is: 1,450.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,612.45 : 3,915.95 = 967.95 : x
  2. Step 2: Convert to fraction form
    2,612.45/3,915.95 = 967.95/x
  3. Step 3: Cross multiply
    2,612.45x = 3,915.95 × 967.95
  4. Step 4: Simplify right side
    2,612.45x = 3,790,438.96
  5. Step 5: Solve for x
    x = 3,790,438.96/2,612.45
  6. Step 6: Final answer
    x = 1,450.91

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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.