Home / 1,869.88-2,580.68-1,208.65

Finding the Fourth Proportional to 1,869.88, 2,580.68 and 1,208.65

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Solution

The fourth proportional to 1,869.88, 2,580.68 and 1,208.65 is: 1,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.88 : 2,580.68 = 1,208.65 : x
  2. Step 2: Convert to fraction form
    1,869.88/2,580.68 = 1,208.65/x
  3. Step 3: Cross multiply
    1,869.88x = 2,580.68 × 1,208.65
  4. Step 4: Simplify right side
    1,869.88x = 3,119,138.88
  5. Step 5: Solve for x
    x = 3,119,138.88/1,869.88
  6. Step 6: Final answer
    x = 1,668.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.