Home / 3,920.40-5,409.75-2,242.23

Finding the Fourth Proportional to 3,920.40, 5,409.75 and 2,242.23

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Solution

The fourth proportional to 3,920.40, 5,409.75 and 2,242.23 is: 3,094.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.40 : 5,409.75 = 2,242.23 : x
  2. Step 2: Convert to fraction form
    3,920.40/5,409.75 = 2,242.23/x
  3. Step 3: Cross multiply
    3,920.40x = 5,409.75 × 2,242.23
  4. Step 4: Simplify right side
    3,920.40x = 12,129,903.74
  5. Step 5: Solve for x
    x = 12,129,903.74/3,920.40
  6. Step 6: Final answer
    x = 3,094.05

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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.