Home / 2,156.49-3,235.14-1,278.65

Finding the Fourth Proportional to 2,156.49, 3,235.14 and 1,278.65

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Solution

The fourth proportional to 2,156.49, 3,235.14 and 1,278.65 is: 1,918.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.49 : 3,235.14 = 1,278.65 : x
  2. Step 2: Convert to fraction form
    2,156.49/3,235.14 = 1,278.65/x
  3. Step 3: Cross multiply
    2,156.49x = 3,235.14 × 1,278.65
  4. Step 4: Simplify right side
    2,156.49x = 4,136,619.85
  5. Step 5: Solve for x
    x = 4,136,619.85/2,156.49
  6. Step 6: Final answer
    x = 1,918.22

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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.