Home / 2,421.20-3,340.68-1,373.84

Finding the Fourth Proportional to 2,421.20, 3,340.68 and 1,373.84

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Solution

The fourth proportional to 2,421.20, 3,340.68 and 1,373.84 is: 1,895.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.20 : 3,340.68 = 1,373.84 : x
  2. Step 2: Convert to fraction form
    2,421.20/3,340.68 = 1,373.84/x
  3. Step 3: Cross multiply
    2,421.20x = 3,340.68 × 1,373.84
  4. Step 4: Simplify right side
    2,421.20x = 4,589,559.81
  5. Step 5: Solve for x
    x = 4,589,559.81/2,421.20
  6. Step 6: Final answer
    x = 1,895.57

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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.