Home / 1,556.16-2,147.49-857.40

Finding the Fourth Proportional to 1,556.16, 2,147.49 and 857.40

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Solution

The fourth proportional to 1,556.16, 2,147.49 and 857.40 is: 1,183.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.16 : 2,147.49 = 857.40 : x
  2. Step 2: Convert to fraction form
    1,556.16/2,147.49 = 857.40/x
  3. Step 3: Cross multiply
    1,556.16x = 2,147.49 × 857.40
  4. Step 4: Simplify right side
    1,556.16x = 1,841,257.93
  5. Step 5: Solve for x
    x = 1,841,257.93/1,556.16
  6. Step 6: Final answer
    x = 1,183.21

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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.