Home / 2,421.78-3,320.22-2,378.04

Finding the Fourth Proportional to 2,421.78, 3,320.22 and 2,378.04

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Solution

The fourth proportional to 2,421.78, 3,320.22 and 2,378.04 is: 3,260.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.78 : 3,320.22 = 2,378.04 : x
  2. Step 2: Convert to fraction form
    2,421.78/3,320.22 = 2,378.04/x
  3. Step 3: Cross multiply
    2,421.78x = 3,320.22 × 2,378.04
  4. Step 4: Simplify right side
    2,421.78x = 7,895,615.97
  5. Step 5: Solve for x
    x = 7,895,615.97/2,421.78
  6. Step 6: Final answer
    x = 3,260.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.