Home / 3,072.45-4,239.98-1,675.20

Finding the Fourth Proportional to 3,072.45, 4,239.98 and 1,675.20

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Solution

The fourth proportional to 3,072.45, 4,239.98 and 1,675.20 is: 2,311.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.45 : 4,239.98 = 1,675.20 : x
  2. Step 2: Convert to fraction form
    3,072.45/4,239.98 = 1,675.20/x
  3. Step 3: Cross multiply
    3,072.45x = 4,239.98 × 1,675.20
  4. Step 4: Simplify right side
    3,072.45x = 7,102,814.50
  5. Step 5: Solve for x
    x = 7,102,814.50/3,072.45
  6. Step 6: Final answer
    x = 2,311.78

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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.