Home / 2,280.21-3,146.81-1,395.75

Finding the Fourth Proportional to 2,280.21, 3,146.81 and 1,395.75

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Solution

The fourth proportional to 2,280.21, 3,146.81 and 1,395.75 is: 1,926.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.21 : 3,146.81 = 1,395.75 : x
  2. Step 2: Convert to fraction form
    2,280.21/3,146.81 = 1,395.75/x
  3. Step 3: Cross multiply
    2,280.21x = 3,146.81 × 1,395.75
  4. Step 4: Simplify right side
    2,280.21x = 4,392,153.08
  5. Step 5: Solve for x
    x = 4,392,153.08/2,280.21
  6. Step 6: Final answer
    x = 1,926.21

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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.