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Finding the Fourth Proportional to 1,257.93, 1,886.79 and 849.69

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Solution

The fourth proportional to 1,257.93, 1,886.79 and 849.69 is: 1,274.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.93 : 1,886.79 = 849.69 : x
  2. Step 2: Convert to fraction form
    1,257.93/1,886.79 = 849.69/x
  3. Step 3: Cross multiply
    1,257.93x = 1,886.79 × 849.69
  4. Step 4: Simplify right side
    1,257.93x = 1,603,189.78
  5. Step 5: Solve for x
    x = 1,603,189.78/1,257.93
  6. Step 6: Final answer
    x = 1,274.47

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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.