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Finding the Fourth Proportional to 2,580.75, 3,871.53 and 936.99

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Solution

The fourth proportional to 2,580.75, 3,871.53 and 936.99 is: 1,405.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,580.75 : 3,871.53 = 936.99 : x
  2. Step 2: Convert to fraction form
    2,580.75/3,871.53 = 936.99/x
  3. Step 3: Cross multiply
    2,580.75x = 3,871.53 × 936.99
  4. Step 4: Simplify right side
    2,580.75x = 3,627,584.89
  5. Step 5: Solve for x
    x = 3,627,584.89/2,580.75
  6. Step 6: Final answer
    x = 1,405.63

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1.5x scale

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.