Home / 1,319.58-1,975.97-1,280.66

Finding the Fourth Proportional to 1,319.58, 1,975.97 and 1,280.66

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Solution

The fourth proportional to 1,319.58, 1,975.97 and 1,280.66 is: 1,917.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.58 : 1,975.97 = 1,280.66 : x
  2. Step 2: Convert to fraction form
    1,319.58/1,975.97 = 1,280.66/x
  3. Step 3: Cross multiply
    1,319.58x = 1,975.97 × 1,280.66
  4. Step 4: Simplify right side
    1,319.58x = 2,530,545.74
  5. Step 5: Solve for x
    x = 2,530,545.74/1,319.58
  6. Step 6: Final answer
    x = 1,917.69

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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.