Home / 2,278.37-3,143.60-1,283.65

Finding the Fourth Proportional to 2,278.37, 3,143.60 and 1,283.65

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Solution

The fourth proportional to 2,278.37, 3,143.60 and 1,283.65 is: 1,771.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.37 : 3,143.60 = 1,283.65 : x
  2. Step 2: Convert to fraction form
    2,278.37/3,143.60 = 1,283.65/x
  3. Step 3: Cross multiply
    2,278.37x = 3,143.60 × 1,283.65
  4. Step 4: Simplify right side
    2,278.37x = 4,035,267.86
  5. Step 5: Solve for x
    x = 4,035,267.86/2,278.37
  6. Step 6: Final answer
    x = 1,771.12

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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.