Home / 3,005.74-4,147.40-1,679.47

Finding the Fourth Proportional to 3,005.74, 4,147.40 and 1,679.47

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Solution

The fourth proportional to 3,005.74, 4,147.40 and 1,679.47 is: 2,317.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,005.74 : 4,147.40 = 1,679.47 : x
  2. Step 2: Convert to fraction form
    3,005.74/4,147.40 = 1,679.47/x
  3. Step 3: Cross multiply
    3,005.74x = 4,147.40 × 1,679.47
  4. Step 4: Simplify right side
    3,005.74x = 6,965,427.71
  5. Step 5: Solve for x
    x = 6,965,427.71/3,005.74
  6. Step 6: Final answer
    x = 2,317.37

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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.