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Finding the Fourth Proportional to 1,935.80, 2,919.73 and 1,807.80

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Solution

The fourth proportional to 1,935.80, 2,919.73 and 1,807.80 is: 2,726.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,935.80 : 2,919.73 = 1,807.80 : x
  2. Step 2: Convert to fraction form
    1,935.80/2,919.73 = 1,807.80/x
  3. Step 3: Cross multiply
    1,935.80x = 2,919.73 × 1,807.80
  4. Step 4: Simplify right side
    1,935.80x = 5,278,287.89
  5. Step 5: Solve for x
    x = 5,278,287.89/1,935.80
  6. Step 6: Final answer
    x = 2,726.67

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.