Home / 2,412.21-3,328.80-1,308.21

Finding the Fourth Proportional to 2,412.21, 3,328.80 and 1,308.21

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Solution

The fourth proportional to 2,412.21, 3,328.80 and 1,308.21 is: 1,805.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,412.21 : 3,328.80 = 1,308.21 : x
  2. Step 2: Convert to fraction form
    2,412.21/3,328.80 = 1,308.21/x
  3. Step 3: Cross multiply
    2,412.21x = 3,328.80 × 1,308.21
  4. Step 4: Simplify right side
    2,412.21x = 4,354,769.45
  5. Step 5: Solve for x
    x = 4,354,769.45/2,412.21
  6. Step 6: Final answer
    x = 1,805.30

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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.