Home / 3,785.38-5,678.67-1,319.51

Finding the Fourth Proportional to 3,785.38, 5,678.67 and 1,319.51

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Solution

The fourth proportional to 3,785.38, 5,678.67 and 1,319.51 is: 1,979.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,785.38 : 5,678.67 = 1,319.51 : x
  2. Step 2: Convert to fraction form
    3,785.38/5,678.67 = 1,319.51/x
  3. Step 3: Cross multiply
    3,785.38x = 5,678.67 × 1,319.51
  4. Step 4: Simplify right side
    3,785.38x = 7,493,061.85
  5. Step 5: Solve for x
    x = 7,493,061.85/3,785.38
  6. Step 6: Final answer
    x = 1,979.47

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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.