Home / 1,920.43-2,880.82-1,188.47

Finding the Fourth Proportional to 1,920.43, 2,880.82 and 1,188.47

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Solution

The fourth proportional to 1,920.43, 2,880.82 and 1,188.47 is: 1,782.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.43 : 2,880.82 = 1,188.47 : x
  2. Step 2: Convert to fraction form
    1,920.43/2,880.82 = 1,188.47/x
  3. Step 3: Cross multiply
    1,920.43x = 2,880.82 × 1,188.47
  4. Step 4: Simplify right side
    1,920.43x = 3,423,768.15
  5. Step 5: Solve for x
    x = 3,423,768.15/1,920.43
  6. Step 6: Final answer
    x = 1,782.81

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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.