Home / 2,119.78-3,180.12-659.08

Finding the Fourth Proportional to 2,119.78, 3,180.12 and 659.08

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Solution

The fourth proportional to 2,119.78, 3,180.12 and 659.08 is: 988.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.78 : 3,180.12 = 659.08 : x
  2. Step 2: Convert to fraction form
    2,119.78/3,180.12 = 659.08/x
  3. Step 3: Cross multiply
    2,119.78x = 3,180.12 × 659.08
  4. Step 4: Simplify right side
    2,119.78x = 2,095,953.49
  5. Step 5: Solve for x
    x = 2,095,953.49/2,119.78
  6. Step 6: Final answer
    x = 988.76

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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.