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Finding the Fourth Proportional to 3,491.71, 5,240.70 and 3,120.93

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Solution

The fourth proportional to 3,491.71, 5,240.70 and 3,120.93 is: 4,684.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.71 : 5,240.70 = 3,120.93 : x
  2. Step 2: Convert to fraction form
    3,491.71/5,240.70 = 3,120.93/x
  3. Step 3: Cross multiply
    3,491.71x = 5,240.70 × 3,120.93
  4. Step 4: Simplify right side
    3,491.71x = 16,355,857.85
  5. Step 5: Solve for x
    x = 16,355,857.85/3,491.71
  6. Step 6: Final answer
    x = 4,684.20

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1.5x scale

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.