Home / 1,861.47-2,788.97-1,275.77

Finding the Fourth Proportional to 1,861.47, 2,788.97 and 1,275.77

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Solution

The fourth proportional to 1,861.47, 2,788.97 and 1,275.77 is: 1,911.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.47 : 2,788.97 = 1,275.77 : x
  2. Step 2: Convert to fraction form
    1,861.47/2,788.97 = 1,275.77/x
  3. Step 3: Cross multiply
    1,861.47x = 2,788.97 × 1,275.77
  4. Step 4: Simplify right side
    1,861.47x = 3,558,063.93
  5. Step 5: Solve for x
    x = 3,558,063.93/1,861.47
  6. Step 6: Final answer
    x = 1,911.43

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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.