Home / 2,172.34-2,997.61-1,215.07

Finding the Fourth Proportional to 2,172.34, 2,997.61 and 1,215.07

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Solution

The fourth proportional to 2,172.34, 2,997.61 and 1,215.07 is: 1,676.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.34 : 2,997.61 = 1,215.07 : x
  2. Step 2: Convert to fraction form
    2,172.34/2,997.61 = 1,215.07/x
  3. Step 3: Cross multiply
    2,172.34x = 2,997.61 × 1,215.07
  4. Step 4: Simplify right side
    2,172.34x = 3,642,305.98
  5. Step 5: Solve for x
    x = 3,642,305.98/2,172.34
  6. Step 6: Final answer
    x = 1,676.67

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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.