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Finding the Fourth Proportional to 2,661.09, 3,990.30 and 1,550.87

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Solution

The fourth proportional to 2,661.09, 3,990.30 and 1,550.87 is: 2,325.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.09 : 3,990.30 = 1,550.87 : x
  2. Step 2: Convert to fraction form
    2,661.09/3,990.30 = 1,550.87/x
  3. Step 3: Cross multiply
    2,661.09x = 3,990.30 × 1,550.87
  4. Step 4: Simplify right side
    2,661.09x = 6,188,416.61
  5. Step 5: Solve for x
    x = 6,188,416.61/2,661.09
  6. Step 6: Final answer
    x = 2,325.52

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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.