Home / 2,279.76-3,146.09-1,285.07

Finding the Fourth Proportional to 2,279.76, 3,146.09 and 1,285.07

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Solution

The fourth proportional to 2,279.76, 3,146.09 and 1,285.07 is: 1,773.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.76 : 3,146.09 = 1,285.07 : x
  2. Step 2: Convert to fraction form
    2,279.76/3,146.09 = 1,285.07/x
  3. Step 3: Cross multiply
    2,279.76x = 3,146.09 × 1,285.07
  4. Step 4: Simplify right side
    2,279.76x = 4,042,923.72
  5. Step 5: Solve for x
    x = 4,042,923.72/2,279.76
  6. Step 6: Final answer
    x = 1,773.40

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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.