Home / 3,785.12-5,678.21-1,319.58

Finding the Fourth Proportional to 3,785.12, 5,678.21 and 1,319.58

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Solution

The fourth proportional to 3,785.12, 5,678.21 and 1,319.58 is: 1,979.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,785.12 : 5,678.21 = 1,319.58 : x
  2. Step 2: Convert to fraction form
    3,785.12/5,678.21 = 1,319.58/x
  3. Step 3: Cross multiply
    3,785.12x = 5,678.21 × 1,319.58
  4. Step 4: Simplify right side
    3,785.12x = 7,492,852.35
  5. Step 5: Solve for x
    x = 7,492,852.35/3,785.12
  6. Step 6: Final answer
    x = 1,979.55

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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.