Home / 2,489.40-3,436.37-1,817.81

Finding the Fourth Proportional to 2,489.40, 3,436.37 and 1,817.81

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Solution

The fourth proportional to 2,489.40, 3,436.37 and 1,817.81 is: 2,509.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.40 : 3,436.37 = 1,817.81 : x
  2. Step 2: Convert to fraction form
    2,489.40/3,436.37 = 1,817.81/x
  3. Step 3: Cross multiply
    2,489.40x = 3,436.37 × 1,817.81
  4. Step 4: Simplify right side
    2,489.40x = 6,246,671.41
  5. Step 5: Solve for x
    x = 6,246,671.41/2,489.40
  6. Step 6: Final answer
    x = 2,509.31

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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.