Home / 3,431.16-5,145.48-1,239.36

Finding the Fourth Proportional to 3,431.16, 5,145.48 and 1,239.36

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Solution

The fourth proportional to 3,431.16, 5,145.48 and 1,239.36 is: 1,858.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.16 : 5,145.48 = 1,239.36 : x
  2. Step 2: Convert to fraction form
    3,431.16/5,145.48 = 1,239.36/x
  3. Step 3: Cross multiply
    3,431.16x = 5,145.48 × 1,239.36
  4. Step 4: Simplify right side
    3,431.16x = 6,377,102.09
  5. Step 5: Solve for x
    x = 6,377,102.09/3,431.16
  6. Step 6: Final answer
    x = 1,858.58

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1.5x scale

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.