Home / 3,215.80-4,437.30-1,890.64

Finding the Fourth Proportional to 3,215.80, 4,437.30 and 1,890.64

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Solution

The fourth proportional to 3,215.80, 4,437.30 and 1,890.64 is: 2,608.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.80 : 4,437.30 = 1,890.64 : x
  2. Step 2: Convert to fraction form
    3,215.80/4,437.30 = 1,890.64/x
  3. Step 3: Cross multiply
    3,215.80x = 4,437.30 × 1,890.64
  4. Step 4: Simplify right side
    3,215.80x = 8,389,336.87
  5. Step 5: Solve for x
    x = 8,389,336.87/3,215.80
  6. Step 6: Final answer
    x = 2,608.79

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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.