Home / 3,172.50-4,378.05-1,775.70

Finding the Fourth Proportional to 3,172.50, 4,378.05 and 1,775.70

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Solution

The fourth proportional to 3,172.50, 4,378.05 and 1,775.70 is: 2,450.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.50 : 4,378.05 = 1,775.70 : x
  2. Step 2: Convert to fraction form
    3,172.50/4,378.05 = 1,775.70/x
  3. Step 3: Cross multiply
    3,172.50x = 4,378.05 × 1,775.70
  4. Step 4: Simplify right side
    3,172.50x = 7,774,103.39
  5. Step 5: Solve for x
    x = 7,774,103.39/3,172.50
  6. Step 6: Final answer
    x = 2,450.47

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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.