Home / 2,785.40-4,177.62-1,304.78

Finding the Fourth Proportional to 2,785.40, 4,177.62 and 1,304.78

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Solution

The fourth proportional to 2,785.40, 4,177.62 and 1,304.78 is: 1,956.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.40 : 4,177.62 = 1,304.78 : x
  2. Step 2: Convert to fraction form
    2,785.40/4,177.62 = 1,304.78/x
  3. Step 3: Cross multiply
    2,785.40x = 4,177.62 × 1,304.78
  4. Step 4: Simplify right side
    2,785.40x = 5,450,857.40
  5. Step 5: Solve for x
    x = 5,450,857.40/2,785.40
  6. Step 6: Final answer
    x = 1,956.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.