Home / 2,990.03-4,126.56-1,811.12

Finding the Fourth Proportional to 2,990.03, 4,126.56 and 1,811.12

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Solution

The fourth proportional to 2,990.03, 4,126.56 and 1,811.12 is: 2,499.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.03 : 4,126.56 = 1,811.12 : x
  2. Step 2: Convert to fraction form
    2,990.03/4,126.56 = 1,811.12/x
  3. Step 3: Cross multiply
    2,990.03x = 4,126.56 × 1,811.12
  4. Step 4: Simplify right side
    2,990.03x = 7,473,695.35
  5. Step 5: Solve for x
    x = 7,473,695.35/2,990.03
  6. Step 6: Final answer
    x = 2,499.54

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Half scale
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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.