Home / 2,091.09-2,883.36-1,428.30

Finding the Fourth Proportional to 2,091.09, 2,883.36 and 1,428.30

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Solution

The fourth proportional to 2,091.09, 2,883.36 and 1,428.30 is: 1,969.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.09 : 2,883.36 = 1,428.30 : x
  2. Step 2: Convert to fraction form
    2,091.09/2,883.36 = 1,428.30/x
  3. Step 3: Cross multiply
    2,091.09x = 2,883.36 × 1,428.30
  4. Step 4: Simplify right side
    2,091.09x = 4,118,303.09
  5. Step 5: Solve for x
    x = 4,118,303.09/2,091.09
  6. Step 6: Final answer
    x = 1,969.45

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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.