Home / 1,914.24-2,642-1,128.32

Finding the Fourth Proportional to 1,914.24, 2,642 and 1,128.32

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Solution

The fourth proportional to 1,914.24, 2,642 and 1,128.32 is: 1,557.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.24 : 2,642 = 1,128.32 : x
  2. Step 2: Convert to fraction form
    1,914.24/2,642 = 1,128.32/x
  3. Step 3: Cross multiply
    1,914.24x = 2,642 × 1,128.32
  4. Step 4: Simplify right side
    1,914.24x = 2,981,021.44
  5. Step 5: Solve for x
    x = 2,981,021.44/1,914.24
  6. Step 6: Final answer
    x = 1,557.29

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Double scale
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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.