Home / 2,556.85-3,529.58-1,988.39

Finding the Fourth Proportional to 2,556.85, 3,529.58 and 1,988.39

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Solution

The fourth proportional to 2,556.85, 3,529.58 and 1,988.39 is: 2,744.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,556.85 : 3,529.58 = 1,988.39 : x
  2. Step 2: Convert to fraction form
    2,556.85/3,529.58 = 1,988.39/x
  3. Step 3: Cross multiply
    2,556.85x = 3,529.58 × 1,988.39
  4. Step 4: Simplify right side
    2,556.85x = 7,018,202.20
  5. Step 5: Solve for x
    x = 7,018,202.20/2,556.85
  6. Step 6: Final answer
    x = 2,744.87

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1.5x scale

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.