Home / 2,755.68-4,128.06-1,290.40

Finding the Fourth Proportional to 2,755.68, 4,128.06 and 1,290.40

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Solution

The fourth proportional to 2,755.68, 4,128.06 and 1,290.40 is: 1,933.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,755.68 : 4,128.06 = 1,290.40 : x
  2. Step 2: Convert to fraction form
    2,755.68/4,128.06 = 1,290.40/x
  3. Step 3: Cross multiply
    2,755.68x = 4,128.06 × 1,290.40
  4. Step 4: Simplify right side
    2,755.68x = 5,326,848.62
  5. Step 5: Solve for x
    x = 5,326,848.62/2,755.68
  6. Step 6: Final answer
    x = 1,933.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.