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Finding the Fourth Proportional to 1,296.41, 1,788.28 and 871.19

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Solution

The fourth proportional to 1,296.41, 1,788.28 and 871.19 is: 1,201.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.41 : 1,788.28 = 871.19 : x
  2. Step 2: Convert to fraction form
    1,296.41/1,788.28 = 871.19/x
  3. Step 3: Cross multiply
    1,296.41x = 1,788.28 × 871.19
  4. Step 4: Simplify right side
    1,296.41x = 1,557,927.24
  5. Step 5: Solve for x
    x = 1,557,927.24/1,296.41
  6. Step 6: Final answer
    x = 1,201.73

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1.5x scale

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.