Home / 2,108.90-2,910.47-1,212.75

Finding the Fourth Proportional to 2,108.90, 2,910.47 and 1,212.75

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Solution

The fourth proportional to 2,108.90, 2,910.47 and 1,212.75 is: 1,673.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.90 : 2,910.47 = 1,212.75 : x
  2. Step 2: Convert to fraction form
    2,108.90/2,910.47 = 1,212.75/x
  3. Step 3: Cross multiply
    2,108.90x = 2,910.47 × 1,212.75
  4. Step 4: Simplify right side
    2,108.90x = 3,529,666.43
  5. Step 5: Solve for x
    x = 3,529,666.43/2,108.90
  6. Step 6: Final answer
    x = 1,673.70

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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.