Home / 2,172.21-2,997.65-1,177.51

Finding the Fourth Proportional to 2,172.21, 2,997.65 and 1,177.51

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Solution

The fourth proportional to 2,172.21, 2,997.65 and 1,177.51 is: 1,624.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.21 : 2,997.65 = 1,177.51 : x
  2. Step 2: Convert to fraction form
    2,172.21/2,997.65 = 1,177.51/x
  3. Step 3: Cross multiply
    2,172.21x = 2,997.65 × 1,177.51
  4. Step 4: Simplify right side
    2,172.21x = 3,529,741.98
  5. Step 5: Solve for x
    x = 3,529,741.98/2,172.21
  6. Step 6: Final answer
    x = 1,624.95

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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.