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Finding the Fourth Proportional to 1,941.21, 2,912.31 and 708.75

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Solution

The fourth proportional to 1,941.21, 2,912.31 and 708.75 is: 1,063.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,941.21 : 2,912.31 = 708.75 : x
  2. Step 2: Convert to fraction form
    1,941.21/2,912.31 = 708.75/x
  3. Step 3: Cross multiply
    1,941.21x = 2,912.31 × 708.75
  4. Step 4: Simplify right side
    1,941.21x = 2,064,099.71
  5. Step 5: Solve for x
    x = 2,064,099.71/1,941.21
  6. Step 6: Final answer
    x = 1,063.31

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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.