Home / 1,989.98-2,746.19-1,105.80

Finding the Fourth Proportional to 1,989.98, 2,746.19 and 1,105.80

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Solution

The fourth proportional to 1,989.98, 2,746.19 and 1,105.80 is: 1,526.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.98 : 2,746.19 = 1,105.80 : x
  2. Step 2: Convert to fraction form
    1,989.98/2,746.19 = 1,105.80/x
  3. Step 3: Cross multiply
    1,989.98x = 2,746.19 × 1,105.80
  4. Step 4: Simplify right side
    1,989.98x = 3,036,736.90
  5. Step 5: Solve for x
    x = 3,036,736.90/1,989.98
  6. Step 6: Final answer
    x = 1,526.01

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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.