Home / 2,087.39-2,879.68-1,247.67

Finding the Fourth Proportional to 2,087.39, 2,879.68 and 1,247.67

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Solution

The fourth proportional to 2,087.39, 2,879.68 and 1,247.67 is: 1,721.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,087.39 : 2,879.68 = 1,247.67 : x
  2. Step 2: Convert to fraction form
    2,087.39/2,879.68 = 1,247.67/x
  3. Step 3: Cross multiply
    2,087.39x = 2,879.68 × 1,247.67
  4. Step 4: Simplify right side
    2,087.39x = 3,592,887.23
  5. Step 5: Solve for x
    x = 3,592,887.23/2,087.39
  6. Step 6: Final answer
    x = 1,721.23

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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.