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Finding the Fourth Proportional to 2,631.25, 3,946.87 and 683.46

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Solution

The fourth proportional to 2,631.25, 3,946.87 and 683.46 is: 1,025.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.25 : 3,946.87 = 683.46 : x
  2. Step 2: Convert to fraction form
    2,631.25/3,946.87 = 683.46/x
  3. Step 3: Cross multiply
    2,631.25x = 3,946.87 × 683.46
  4. Step 4: Simplify right side
    2,631.25x = 2,697,527.77
  5. Step 5: Solve for x
    x = 2,697,527.77/2,631.25
  6. Step 6: Final answer
    x = 1,025.19

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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.