Home / 1,290.39-1,937.69-1,224.65

Finding the Fourth Proportional to 1,290.39, 1,937.69 and 1,224.65

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Solution

The fourth proportional to 1,290.39, 1,937.69 and 1,224.65 is: 1,838.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.39 : 1,937.69 = 1,224.65 : x
  2. Step 2: Convert to fraction form
    1,290.39/1,937.69 = 1,224.65/x
  3. Step 3: Cross multiply
    1,290.39x = 1,937.69 × 1,224.65
  4. Step 4: Simplify right side
    1,290.39x = 2,372,992.06
  5. Step 5: Solve for x
    x = 2,372,992.06/1,290.39
  6. Step 6: Final answer
    x = 1,838.97

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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.