Home / 2,280.95-3,147.65-1,286.19

Finding the Fourth Proportional to 2,280.95, 3,147.65 and 1,286.19

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Solution

The fourth proportional to 2,280.95, 3,147.65 and 1,286.19 is: 1,774.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,280.95 : 3,147.65 = 1,286.19 : x
  2. Step 2: Convert to fraction form
    2,280.95/3,147.65 = 1,286.19/x
  3. Step 3: Cross multiply
    2,280.95x = 3,147.65 × 1,286.19
  4. Step 4: Simplify right side
    2,280.95x = 4,048,475.95
  5. Step 5: Solve for x
    x = 4,048,475.95/2,280.95
  6. Step 6: Final answer
    x = 1,774.91

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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.