Home / 3,970.35-5,478.87-2,291.66

Finding the Fourth Proportional to 3,970.35, 5,478.87 and 2,291.66

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Solution

The fourth proportional to 3,970.35, 5,478.87 and 2,291.66 is: 3,162.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.35 : 5,478.87 = 2,291.66 : x
  2. Step 2: Convert to fraction form
    3,970.35/5,478.87 = 2,291.66/x
  3. Step 3: Cross multiply
    3,970.35x = 5,478.87 × 2,291.66
  4. Step 4: Simplify right side
    3,970.35x = 12,555,707.22
  5. Step 5: Solve for x
    x = 12,555,707.22/3,970.35
  6. Step 6: Final answer
    x = 3,162.37

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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.