Home / 1,431.26-2,147.09-457.14

Finding the Fourth Proportional to 1,431.26, 2,147.09 and 457.14

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Solution

The fourth proportional to 1,431.26, 2,147.09 and 457.14 is: 685.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.26 : 2,147.09 = 457.14 : x
  2. Step 2: Convert to fraction form
    1,431.26/2,147.09 = 457.14/x
  3. Step 3: Cross multiply
    1,431.26x = 2,147.09 × 457.14
  4. Step 4: Simplify right side
    1,431.26x = 981,518.44
  5. Step 5: Solve for x
    x = 981,518.44/1,431.26
  6. Step 6: Final answer
    x = 685.77

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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.