Home / 1,556.30-2,147.70-857.67

Finding the Fourth Proportional to 1,556.30, 2,147.70 and 857.67

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Solution

The fourth proportional to 1,556.30, 2,147.70 and 857.67 is: 1,183.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.30 : 2,147.70 = 857.67 : x
  2. Step 2: Convert to fraction form
    1,556.30/2,147.70 = 857.67/x
  3. Step 3: Cross multiply
    1,556.30x = 2,147.70 × 857.67
  4. Step 4: Simplify right side
    1,556.30x = 1,842,020.28
  5. Step 5: Solve for x
    x = 1,842,020.28/1,556.30
  6. Step 6: Final answer
    x = 1,183.59

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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.