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Finding the Fourth Proportional to 1,804.19, 2,489.78 and 1,018.22

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Solution

The fourth proportional to 1,804.19, 2,489.78 and 1,018.22 is: 1,405.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,804.19 : 2,489.78 = 1,018.22 : x
  2. Step 2: Convert to fraction form
    1,804.19/2,489.78 = 1,018.22/x
  3. Step 3: Cross multiply
    1,804.19x = 2,489.78 × 1,018.22
  4. Step 4: Simplify right side
    1,804.19x = 2,535,143.79
  5. Step 5: Solve for x
    x = 2,535,143.79/1,804.19
  6. Step 6: Final answer
    x = 1,405.14

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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.