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Finding the Fourth Proportional to 2,347.70, 3,239.82 and 1,299.80

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Solution

The fourth proportional to 2,347.70, 3,239.82 and 1,299.80 is: 1,793.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,347.70 : 3,239.82 = 1,299.80 : x
  2. Step 2: Convert to fraction form
    2,347.70/3,239.82 = 1,299.80/x
  3. Step 3: Cross multiply
    2,347.70x = 3,239.82 × 1,299.80
  4. Step 4: Simplify right side
    2,347.70x = 4,211,118.04
  5. Step 5: Solve for x
    x = 4,211,118.04/2,347.70
  6. Step 6: Final answer
    x = 1,793.72

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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.