Home / 3,485.12-4,789-2,785.28

Finding the Fourth Proportional to 3,485.12, 4,789 and 2,785.28

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Solution

The fourth proportional to 3,485.12, 4,789 and 2,785.28 is: 3,827.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485.12 : 4,789 = 2,785.28 : x
  2. Step 2: Convert to fraction form
    3,485.12/4,789 = 2,785.28/x
  3. Step 3: Cross multiply
    3,485.12x = 4,789 × 2,785.28
  4. Step 4: Simplify right side
    3,485.12x = 13,338,705.92
  5. Step 5: Solve for x
    x = 13,338,705.92/3,485.12
  6. Step 6: Final answer
    x = 3,827.33

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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.