Home / 1,999.61-2,759.48-1,115.45

Finding the Fourth Proportional to 1,999.61, 2,759.48 and 1,115.45

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Solution

The fourth proportional to 1,999.61, 2,759.48 and 1,115.45 is: 1,539.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.61 : 2,759.48 = 1,115.45 : x
  2. Step 2: Convert to fraction form
    1,999.61/2,759.48 = 1,115.45/x
  3. Step 3: Cross multiply
    1,999.61x = 2,759.48 × 1,115.45
  4. Step 4: Simplify right side
    1,999.61x = 3,078,061.97
  5. Step 5: Solve for x
    x = 3,078,061.97/1,999.61
  6. Step 6: Final answer
    x = 1,539.33

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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.