Home / 1,581.05-2,181.52-1,208.45

Finding the Fourth Proportional to 1,581.05, 2,181.52 and 1,208.45

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Solution

The fourth proportional to 1,581.05, 2,181.52 and 1,208.45 is: 1,667.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.05 : 2,181.52 = 1,208.45 : x
  2. Step 2: Convert to fraction form
    1,581.05/2,181.52 = 1,208.45/x
  3. Step 3: Cross multiply
    1,581.05x = 2,181.52 × 1,208.45
  4. Step 4: Simplify right side
    1,581.05x = 2,636,257.84
  5. Step 5: Solve for x
    x = 2,636,257.84/1,581.05
  6. Step 6: Final answer
    x = 1,667.41

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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.