Home / 1,367.36-1,883.68-1,129.76

Finding the Fourth Proportional to 1,367.36, 1,883.68 and 1,129.76

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Solution

The fourth proportional to 1,367.36, 1,883.68 and 1,129.76 is: 1,556.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,367.36 : 1,883.68 = 1,129.76 : x
  2. Step 2: Convert to fraction form
    1,367.36/1,883.68 = 1,129.76/x
  3. Step 3: Cross multiply
    1,367.36x = 1,883.68 × 1,129.76
  4. Step 4: Simplify right side
    1,367.36x = 2,128,106.32
  5. Step 5: Solve for x
    x = 2,128,106.32/1,367.36
  6. Step 6: Final answer
    x = 1,556.36

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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.