Home / 1,220.09-1,837.82-1,111.10

Finding the Fourth Proportional to 1,220.09, 1,837.82 and 1,111.10

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Solution

The fourth proportional to 1,220.09, 1,837.82 and 1,111.10 is: 1,673.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.09 : 1,837.82 = 1,111.10 : x
  2. Step 2: Convert to fraction form
    1,220.09/1,837.82 = 1,111.10/x
  3. Step 3: Cross multiply
    1,220.09x = 1,837.82 × 1,111.10
  4. Step 4: Simplify right side
    1,220.09x = 2,041,989.84
  5. Step 5: Solve for x
    x = 2,041,989.84/1,220.09
  6. Step 6: Final answer
    x = 1,673.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.