Home / 1,861.56-2,803.20-1,378.02

Finding the Fourth Proportional to 1,861.56, 2,803.20 and 1,378.02

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Solution

The fourth proportional to 1,861.56, 2,803.20 and 1,378.02 is: 2,075.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.56 : 2,803.20 = 1,378.02 : x
  2. Step 2: Convert to fraction form
    1,861.56/2,803.20 = 1,378.02/x
  3. Step 3: Cross multiply
    1,861.56x = 2,803.20 × 1,378.02
  4. Step 4: Simplify right side
    1,861.56x = 3,862,865.66
  5. Step 5: Solve for x
    x = 3,862,865.66/1,861.56
  6. Step 6: Final answer
    x = 2,075.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.