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Finding the Fourth Proportional to 1,296, 1,943.93 and 747.79

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Solution

The fourth proportional to 1,296, 1,943.93 and 747.79 is: 1,121.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296 : 1,943.93 = 747.79 : x
  2. Step 2: Convert to fraction form
    1,296/1,943.93 = 747.79/x
  3. Step 3: Cross multiply
    1,296x = 1,943.93 × 747.79
  4. Step 4: Simplify right side
    1,296x = 1,453,648.42
  5. Step 5: Solve for x
    x = 1,453,648.42/1,296
  6. Step 6: Final answer
    x = 1,121.64

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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.