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Finding the Fourth Proportional to 3,528.80, 4,879.04 and 3,091.40

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Solution

The fourth proportional to 3,528.80, 4,879.04 and 3,091.40 is: 4,274.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,528.80 : 4,879.04 = 3,091.40 : x
  2. Step 2: Convert to fraction form
    3,528.80/4,879.04 = 3,091.40/x
  3. Step 3: Cross multiply
    3,528.80x = 4,879.04 × 3,091.40
  4. Step 4: Simplify right side
    3,528.80x = 15,083,064.26
  5. Step 5: Solve for x
    x = 15,083,064.26/3,528.80
  6. Step 6: Final answer
    x = 4,274.28

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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.