Home / 2,115.62-3,172.67-1,075.28

Finding the Fourth Proportional to 2,115.62, 3,172.67 and 1,075.28

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Solution

The fourth proportional to 2,115.62, 3,172.67 and 1,075.28 is: 1,612.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.62 : 3,172.67 = 1,075.28 : x
  2. Step 2: Convert to fraction form
    2,115.62/3,172.67 = 1,075.28/x
  3. Step 3: Cross multiply
    2,115.62x = 3,172.67 × 1,075.28
  4. Step 4: Simplify right side
    2,115.62x = 3,411,491.39
  5. Step 5: Solve for x
    x = 3,411,491.39/2,115.62
  6. Step 6: Final answer
    x = 1,612.53

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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.