Home / 3,770.40-5,203.80-2,780.79

Finding the Fourth Proportional to 3,770.40, 5,203.80 and 2,780.79

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Solution

The fourth proportional to 3,770.40, 5,203.80 and 2,780.79 is: 3,837.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,770.40 : 5,203.80 = 2,780.79 : x
  2. Step 2: Convert to fraction form
    3,770.40/5,203.80 = 2,780.79/x
  3. Step 3: Cross multiply
    3,770.40x = 5,203.80 × 2,780.79
  4. Step 4: Simplify right side
    3,770.40x = 14,470,675.00
  5. Step 5: Solve for x
    x = 14,470,675.00/3,770.40
  6. Step 6: Final answer
    x = 3,837.97

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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.