Home / 1,901.21-2,623.68-1,115.09

Finding the Fourth Proportional to 1,901.21, 2,623.68 and 1,115.09

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Solution

The fourth proportional to 1,901.21, 2,623.68 and 1,115.09 is: 1,538.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,901.21 : 2,623.68 = 1,115.09 : x
  2. Step 2: Convert to fraction form
    1,901.21/2,623.68 = 1,115.09/x
  3. Step 3: Cross multiply
    1,901.21x = 2,623.68 × 1,115.09
  4. Step 4: Simplify right side
    1,901.21x = 2,925,639.33
  5. Step 5: Solve for x
    x = 2,925,639.33/1,901.21
  6. Step 6: Final answer
    x = 1,538.83

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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.