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Finding the Fourth Proportional to 2,491.81, 3,738.05 and 847.91

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Solution

The fourth proportional to 2,491.81, 3,738.05 and 847.91 is: 1,271.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.81 : 3,738.05 = 847.91 : x
  2. Step 2: Convert to fraction form
    2,491.81/3,738.05 = 847.91/x
  3. Step 3: Cross multiply
    2,491.81x = 3,738.05 × 847.91
  4. Step 4: Simplify right side
    2,491.81x = 3,169,529.98
  5. Step 5: Solve for x
    x = 3,169,529.98/2,491.81
  6. Step 6: Final answer
    x = 1,271.98

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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.