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Finding the Fourth Proportional to 1,912.52, 2,867.34 and 938.12

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Solution

The fourth proportional to 1,912.52, 2,867.34 and 938.12 is: 1,406.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,912.52 : 2,867.34 = 938.12 : x
  2. Step 2: Convert to fraction form
    1,912.52/2,867.34 = 938.12/x
  3. Step 3: Cross multiply
    1,912.52x = 2,867.34 × 938.12
  4. Step 4: Simplify right side
    1,912.52x = 2,689,909.00
  5. Step 5: Solve for x
    x = 2,689,909.00/1,912.52
  6. Step 6: Final answer
    x = 1,406.47

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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.