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Finding the Fourth Proportional to 1,804.42, 2,489.81 and 1,018.31

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Solution

The fourth proportional to 1,804.42, 2,489.81 and 1,018.31 is: 1,405.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,804.42 : 2,489.81 = 1,018.31 : x
  2. Step 2: Convert to fraction form
    1,804.42/2,489.81 = 1,018.31/x
  3. Step 3: Cross multiply
    1,804.42x = 2,489.81 × 1,018.31
  4. Step 4: Simplify right side
    1,804.42x = 2,535,393.33
  5. Step 5: Solve for x
    x = 2,535,393.33/1,804.42
  6. Step 6: Final answer
    x = 1,405.11

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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.