Home / 1,639.88-2,456.71-1,270.32

Finding the Fourth Proportional to 1,639.88, 2,456.71 and 1,270.32

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Solution

The fourth proportional to 1,639.88, 2,456.71 and 1,270.32 is: 1,903.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.88 : 2,456.71 = 1,270.32 : x
  2. Step 2: Convert to fraction form
    1,639.88/2,456.71 = 1,270.32/x
  3. Step 3: Cross multiply
    1,639.88x = 2,456.71 × 1,270.32
  4. Step 4: Simplify right side
    1,639.88x = 3,120,804.67
  5. Step 5: Solve for x
    x = 3,120,804.67/1,639.88
  6. Step 6: Final answer
    x = 1,903.07

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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.