Home / 2,990.05-4,125.59-1,811.09

Finding the Fourth Proportional to 2,990.05, 4,125.59 and 1,811.09

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Solution

The fourth proportional to 2,990.05, 4,125.59 and 1,811.09 is: 2,498.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.05 : 4,125.59 = 1,811.09 : x
  2. Step 2: Convert to fraction form
    2,990.05/4,125.59 = 1,811.09/x
  3. Step 3: Cross multiply
    2,990.05x = 4,125.59 × 1,811.09
  4. Step 4: Simplify right side
    2,990.05x = 7,471,814.79
  5. Step 5: Solve for x
    x = 7,471,814.79/2,990.05
  6. Step 6: Final answer
    x = 2,498.89

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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.