Home / 2,990.32-4,127.35-1,811.16

Finding the Fourth Proportional to 2,990.32, 4,127.35 and 1,811.16

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Solution

The fourth proportional to 2,990.32, 4,127.35 and 1,811.16 is: 2,499.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.32 : 4,127.35 = 1,811.16 : x
  2. Step 2: Convert to fraction form
    2,990.32/4,127.35 = 1,811.16/x
  3. Step 3: Cross multiply
    2,990.32x = 4,127.35 × 1,811.16
  4. Step 4: Simplify right side
    2,990.32x = 7,475,286.70
  5. Step 5: Solve for x
    x = 7,475,286.70/2,990.32
  6. Step 6: Final answer
    x = 2,499.83

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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.