Home / 1,556.89-2,331.21-1,284.20

Finding the Fourth Proportional to 1,556.89, 2,331.21 and 1,284.20

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Solution

The fourth proportional to 1,556.89, 2,331.21 and 1,284.20 is: 1,922.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.89 : 2,331.21 = 1,284.20 : x
  2. Step 2: Convert to fraction form
    1,556.89/2,331.21 = 1,284.20/x
  3. Step 3: Cross multiply
    1,556.89x = 2,331.21 × 1,284.20
  4. Step 4: Simplify right side
    1,556.89x = 2,993,738.87
  5. Step 5: Solve for x
    x = 2,993,738.87/1,556.89
  6. Step 6: Final answer
    x = 1,922.90

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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.