Home / 2,172.18-3,255.80-1,077.32

Finding the Fourth Proportional to 2,172.18, 3,255.80 and 1,077.32

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Solution

The fourth proportional to 2,172.18, 3,255.80 and 1,077.32 is: 1,614.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.18 : 3,255.80 = 1,077.32 : x
  2. Step 2: Convert to fraction form
    2,172.18/3,255.80 = 1,077.32/x
  3. Step 3: Cross multiply
    2,172.18x = 3,255.80 × 1,077.32
  4. Step 4: Simplify right side
    2,172.18x = 3,507,538.46
  5. Step 5: Solve for x
    x = 3,507,538.46/2,172.18
  6. Step 6: Final answer
    x = 1,614.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.