Home / 2,290.65-3,436.95-1,121.70

Finding the Fourth Proportional to 2,290.65, 3,436.95 and 1,121.70

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Solution

The fourth proportional to 2,290.65, 3,436.95 and 1,121.70 is: 1,683.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,290.65 : 3,436.95 = 1,121.70 : x
  2. Step 2: Convert to fraction form
    2,290.65/3,436.95 = 1,121.70/x
  3. Step 3: Cross multiply
    2,290.65x = 3,436.95 × 1,121.70
  4. Step 4: Simplify right side
    2,290.65x = 3,855,226.82
  5. Step 5: Solve for x
    x = 3,855,226.82/2,290.65
  6. Step 6: Final answer
    x = 1,683.03

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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.