Home / 2,311.65-3,190.10-1,427.99

Finding the Fourth Proportional to 2,311.65, 3,190.10 and 1,427.99

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Solution

The fourth proportional to 2,311.65, 3,190.10 and 1,427.99 is: 1,970.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.65 : 3,190.10 = 1,427.99 : x
  2. Step 2: Convert to fraction form
    2,311.65/3,190.10 = 1,427.99/x
  3. Step 3: Cross multiply
    2,311.65x = 3,190.10 × 1,427.99
  4. Step 4: Simplify right side
    2,311.65x = 4,555,407.81
  5. Step 5: Solve for x
    x = 4,555,407.81/2,311.65
  6. Step 6: Final answer
    x = 1,970.63

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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.