Home / 1,428.16-2,138.48-1,149.03

Finding the Fourth Proportional to 1,428.16, 2,138.48 and 1,149.03

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Solution

The fourth proportional to 1,428.16, 2,138.48 and 1,149.03 is: 1,720.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.16 : 2,138.48 = 1,149.03 : x
  2. Step 2: Convert to fraction form
    1,428.16/2,138.48 = 1,149.03/x
  3. Step 3: Cross multiply
    1,428.16x = 2,138.48 × 1,149.03
  4. Step 4: Simplify right side
    1,428.16x = 2,457,170.22
  5. Step 5: Solve for x
    x = 2,457,170.22/1,428.16
  6. Step 6: Final answer
    x = 1,720.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.