Home / 2,115.08-3,172.44-654.32

Finding the Fourth Proportional to 2,115.08, 3,172.44 and 654.32

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Solution

The fourth proportional to 2,115.08, 3,172.44 and 654.32 is: 981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.08 : 3,172.44 = 654.32 : x
  2. Step 2: Convert to fraction form
    2,115.08/3,172.44 = 654.32/x
  3. Step 3: Cross multiply
    2,115.08x = 3,172.44 × 654.32
  4. Step 4: Simplify right side
    2,115.08x = 2,075,790.94
  5. Step 5: Solve for x
    x = 2,075,790.94/2,115.08
  6. Step 6: Final answer
    x = 981.42

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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.