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Finding the Fourth Proportional to 2,859.75, 3,943.76 and 1,865.79

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Solution

The fourth proportional to 2,859.75, 3,943.76 and 1,865.79 is: 2,573.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.75 : 3,943.76 = 1,865.79 : x
  2. Step 2: Convert to fraction form
    2,859.75/3,943.76 = 1,865.79/x
  3. Step 3: Cross multiply
    2,859.75x = 3,943.76 × 1,865.79
  4. Step 4: Simplify right side
    2,859.75x = 7,358,218.64
  5. Step 5: Solve for x
    x = 7,358,218.64/2,859.75
  6. Step 6: Final answer
    x = 2,573.03

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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.