Home / 1,511.58-2,086.23-890.94

Finding the Fourth Proportional to 1,511.58, 2,086.23 and 890.94

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Solution

The fourth proportional to 1,511.58, 2,086.23 and 890.94 is: 1,229.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.58 : 2,086.23 = 890.94 : x
  2. Step 2: Convert to fraction form
    1,511.58/2,086.23 = 890.94/x
  3. Step 3: Cross multiply
    1,511.58x = 2,086.23 × 890.94
  4. Step 4: Simplify right side
    1,511.58x = 1,858,705.76
  5. Step 5: Solve for x
    x = 1,858,705.76/1,511.58
  6. Step 6: Final answer
    x = 1,229.64

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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.