Home / 3,071.80-4,607.70-2,780.20

Finding the Fourth Proportional to 3,071.80, 4,607.70 and 2,780.20

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Solution

The fourth proportional to 3,071.80, 4,607.70 and 2,780.20 is: 4,170.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,071.80 : 4,607.70 = 2,780.20 : x
  2. Step 2: Convert to fraction form
    3,071.80/4,607.70 = 2,780.20/x
  3. Step 3: Cross multiply
    3,071.80x = 4,607.70 × 2,780.20
  4. Step 4: Simplify right side
    3,071.80x = 12,810,327.54
  5. Step 5: Solve for x
    x = 12,810,327.54/3,071.80
  6. Step 6: Final answer
    x = 4,170.30

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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.