Home / 1,975.90-2,958.45-1,280.85

Finding the Fourth Proportional to 1,975.90, 2,958.45 and 1,280.85

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Solution

The fourth proportional to 1,975.90, 2,958.45 and 1,280.85 is: 1,917.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,975.90 : 2,958.45 = 1,280.85 : x
  2. Step 2: Convert to fraction form
    1,975.90/2,958.45 = 1,280.85/x
  3. Step 3: Cross multiply
    1,975.90x = 2,958.45 × 1,280.85
  4. Step 4: Simplify right side
    1,975.90x = 3,789,330.68
  5. Step 5: Solve for x
    x = 3,789,330.68/1,975.90
  6. Step 6: Final answer
    x = 1,917.77

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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.