Home / 1,556.16-2,147.60-857.60

Finding the Fourth Proportional to 1,556.16, 2,147.60 and 857.60

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Solution

The fourth proportional to 1,556.16, 2,147.60 and 857.60 is: 1,183.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.16 : 2,147.60 = 857.60 : x
  2. Step 2: Convert to fraction form
    1,556.16/2,147.60 = 857.60/x
  3. Step 3: Cross multiply
    1,556.16x = 2,147.60 × 857.60
  4. Step 4: Simplify right side
    1,556.16x = 1,841,781.76
  5. Step 5: Solve for x
    x = 1,841,781.76/1,556.16
  6. Step 6: Final answer
    x = 1,183.54

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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.