Home / 1,999.72-2,759.51-1,115.35

Finding the Fourth Proportional to 1,999.72, 2,759.51 and 1,115.35

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Solution

The fourth proportional to 1,999.72, 2,759.51 and 1,115.35 is: 1,539.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.72 : 2,759.51 = 1,115.35 : x
  2. Step 2: Convert to fraction form
    1,999.72/2,759.51 = 1,115.35/x
  3. Step 3: Cross multiply
    1,999.72x = 2,759.51 × 1,115.35
  4. Step 4: Simplify right side
    1,999.72x = 3,077,819.48
  5. Step 5: Solve for x
    x = 3,077,819.48/1,999.72
  6. Step 6: Final answer
    x = 1,539.13

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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.