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Finding the Fourth Proportional to 1,371.54, 2,056.80 and 850.77

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Solution

The fourth proportional to 1,371.54, 2,056.80 and 850.77 is: 1,275.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.54 : 2,056.80 = 850.77 : x
  2. Step 2: Convert to fraction form
    1,371.54/2,056.80 = 850.77/x
  3. Step 3: Cross multiply
    1,371.54x = 2,056.80 × 850.77
  4. Step 4: Simplify right side
    1,371.54x = 1,749,863.74
  5. Step 5: Solve for x
    x = 1,749,863.74/1,371.54
  6. Step 6: Final answer
    x = 1,275.84

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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.