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Finding the Fourth Proportional to 2,807.22, 4,211.21 and 957.83

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Solution

The fourth proportional to 2,807.22, 4,211.21 and 957.83 is: 1,436.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.22 : 4,211.21 = 957.83 : x
  2. Step 2: Convert to fraction form
    2,807.22/4,211.21 = 957.83/x
  3. Step 3: Cross multiply
    2,807.22x = 4,211.21 × 957.83
  4. Step 4: Simplify right side
    2,807.22x = 4,033,636.67
  5. Step 5: Solve for x
    x = 4,033,636.67/2,807.22
  6. Step 6: Final answer
    x = 1,436.88

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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.