Home / 1,542.12-2,128.38-1,448.40

Finding the Fourth Proportional to 1,542.12, 2,128.38 and 1,448.40

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Solution

The fourth proportional to 1,542.12, 2,128.38 and 1,448.40 is: 1,999.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.12 : 2,128.38 = 1,448.40 : x
  2. Step 2: Convert to fraction form
    1,542.12/2,128.38 = 1,448.40/x
  3. Step 3: Cross multiply
    1,542.12x = 2,128.38 × 1,448.40
  4. Step 4: Simplify right side
    1,542.12x = 3,082,745.59
  5. Step 5: Solve for x
    x = 3,082,745.59/1,542.12
  6. Step 6: Final answer
    x = 1,999.03

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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.