Home / 2,107.67-2,908.76-1,223.41

Finding the Fourth Proportional to 2,107.67, 2,908.76 and 1,223.41

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Solution

The fourth proportional to 2,107.67, 2,908.76 and 1,223.41 is: 1,688.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.67 : 2,908.76 = 1,223.41 : x
  2. Step 2: Convert to fraction form
    2,107.67/2,908.76 = 1,223.41/x
  3. Step 3: Cross multiply
    2,107.67x = 2,908.76 × 1,223.41
  4. Step 4: Simplify right side
    2,107.67x = 3,558,599.95
  5. Step 5: Solve for x
    x = 3,558,599.95/2,107.67
  6. Step 6: Final answer
    x = 1,688.41

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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.