Home / 1,431.23-2,145.36-736.36

Finding the Fourth Proportional to 1,431.23, 2,145.36 and 736.36

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Solution

The fourth proportional to 1,431.23, 2,145.36 and 736.36 is: 1,103.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.23 : 2,145.36 = 736.36 : x
  2. Step 2: Convert to fraction form
    1,431.23/2,145.36 = 736.36/x
  3. Step 3: Cross multiply
    1,431.23x = 2,145.36 × 736.36
  4. Step 4: Simplify right side
    1,431.23x = 1,579,746.56
  5. Step 5: Solve for x
    x = 1,579,746.56/1,431.23
  6. Step 6: Final answer
    x = 1,103.77

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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.