Home / 1,542.13-2,128.20-843.51

Finding the Fourth Proportional to 1,542.13, 2,128.20 and 843.51

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Solution

The fourth proportional to 1,542.13, 2,128.20 and 843.51 is: 1,164.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,542.13 : 2,128.20 = 843.51 : x
  2. Step 2: Convert to fraction form
    1,542.13/2,128.20 = 843.51/x
  3. Step 3: Cross multiply
    1,542.13x = 2,128.20 × 843.51
  4. Step 4: Simplify right side
    1,542.13x = 1,795,157.98
  5. Step 5: Solve for x
    x = 1,795,157.98/1,542.13
  6. Step 6: Final answer
    x = 1,164.08

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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.