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Finding the Fourth Proportional to 1,804.80, 2,489.22 and 1,384.50

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Solution

The fourth proportional to 1,804.80, 2,489.22 and 1,384.50 is: 1,909.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,804.80 : 2,489.22 = 1,384.50 : x
  2. Step 2: Convert to fraction form
    1,804.80/2,489.22 = 1,384.50/x
  3. Step 3: Cross multiply
    1,804.80x = 2,489.22 × 1,384.50
  4. Step 4: Simplify right side
    1,804.80x = 3,446,325.09
  5. Step 5: Solve for x
    x = 3,446,325.09/1,804.80
  6. Step 6: Final answer
    x = 1,909.53

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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.