Home / 2,161.42-2,981.37-1,277.17

Finding the Fourth Proportional to 2,161.42, 2,981.37 and 1,277.17

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Solution

The fourth proportional to 2,161.42, 2,981.37 and 1,277.17 is: 1,761.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.42 : 2,981.37 = 1,277.17 : x
  2. Step 2: Convert to fraction form
    2,161.42/2,981.37 = 1,277.17/x
  3. Step 3: Cross multiply
    2,161.42x = 2,981.37 × 1,277.17
  4. Step 4: Simplify right side
    2,161.42x = 3,807,716.32
  5. Step 5: Solve for x
    x = 3,807,716.32/2,161.42
  6. Step 6: Final answer
    x = 1,761.67

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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.