Home / 3,005.78-4,147.79-1,679.58

Finding the Fourth Proportional to 3,005.78, 4,147.79 and 1,679.58

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Solution

The fourth proportional to 3,005.78, 4,147.79 and 1,679.58 is: 2,317.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,005.78 : 4,147.79 = 1,679.58 : x
  2. Step 2: Convert to fraction form
    3,005.78/4,147.79 = 1,679.58/x
  3. Step 3: Cross multiply
    3,005.78x = 4,147.79 × 1,679.58
  4. Step 4: Simplify right side
    3,005.78x = 6,966,536.73
  5. Step 5: Solve for x
    x = 6,966,536.73/3,005.78
  6. Step 6: Final answer
    x = 2,317.72

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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.