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Finding the Fourth Proportional to 1,804.40, 2,700.60 and 1,309.40

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Solution

The fourth proportional to 1,804.40, 2,700.60 and 1,309.40 is: 1,959.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,804.40 : 2,700.60 = 1,309.40 : x
  2. Step 2: Convert to fraction form
    1,804.40/2,700.60 = 1,309.40/x
  3. Step 3: Cross multiply
    1,804.40x = 2,700.60 × 1,309.40
  4. Step 4: Simplify right side
    1,804.40x = 3,536,165.64
  5. Step 5: Solve for x
    x = 3,536,165.64/1,804.40
  6. Step 6: Final answer
    x = 1,959.75

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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.