Home / 1,645.73-2,270.43-1,078.41

Finding the Fourth Proportional to 1,645.73, 2,270.43 and 1,078.41

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Solution

The fourth proportional to 1,645.73, 2,270.43 and 1,078.41 is: 1,487.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.73 : 2,270.43 = 1,078.41 : x
  2. Step 2: Convert to fraction form
    1,645.73/2,270.43 = 1,078.41/x
  3. Step 3: Cross multiply
    1,645.73x = 2,270.43 × 1,078.41
  4. Step 4: Simplify right side
    1,645.73x = 2,448,462.93
  5. Step 5: Solve for x
    x = 2,448,462.93/1,645.73
  6. Step 6: Final answer
    x = 1,487.76

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1.5x scale

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.