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Finding the Fourth Proportional to 2,347.74, 3,239.76 and 1,299.78

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Solution

The fourth proportional to 2,347.74, 3,239.76 and 1,299.78 is: 1,793.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,347.74 : 3,239.76 = 1,299.78 : x
  2. Step 2: Convert to fraction form
    2,347.74/3,239.76 = 1,299.78/x
  3. Step 3: Cross multiply
    2,347.74x = 3,239.76 × 1,299.78
  4. Step 4: Simplify right side
    2,347.74x = 4,210,975.25
  5. Step 5: Solve for x
    x = 4,210,975.25/2,347.74
  6. Step 6: Final answer
    x = 1,793.63

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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.