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Finding the Fourth Proportional to 1,900.71, 2,622.62 and 1,311.03

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Solution

The fourth proportional to 1,900.71, 2,622.62 and 1,311.03 is: 1,808.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,900.71 : 2,622.62 = 1,311.03 : x
  2. Step 2: Convert to fraction form
    1,900.71/2,622.62 = 1,311.03/x
  3. Step 3: Cross multiply
    1,900.71x = 2,622.62 × 1,311.03
  4. Step 4: Simplify right side
    1,900.71x = 3,438,323.66
  5. Step 5: Solve for x
    x = 3,438,323.66/1,900.71
  6. Step 6: Final answer
    x = 1,808.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.