Home / 1,641.33-2,261.05-1,220.95

Finding the Fourth Proportional to 1,641.33, 2,261.05 and 1,220.95

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Solution

The fourth proportional to 1,641.33, 2,261.05 and 1,220.95 is: 1,681.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.33 : 2,261.05 = 1,220.95 : x
  2. Step 2: Convert to fraction form
    1,641.33/2,261.05 = 1,220.95/x
  3. Step 3: Cross multiply
    1,641.33x = 2,261.05 × 1,220.95
  4. Step 4: Simplify right side
    1,641.33x = 2,760,629.00
  5. Step 5: Solve for x
    x = 2,760,629.00/1,641.33
  6. Step 6: Final answer
    x = 1,681.95

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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.