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Finding the Fourth Proportional to 3,990.45, 5,985.74 and 2,041.45

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Solution

The fourth proportional to 3,990.45, 5,985.74 and 2,041.45 is: 3,062.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.45 : 5,985.74 = 2,041.45 : x
  2. Step 2: Convert to fraction form
    3,990.45/5,985.74 = 2,041.45/x
  3. Step 3: Cross multiply
    3,990.45x = 5,985.74 × 2,041.45
  4. Step 4: Simplify right side
    3,990.45x = 12,219,588.92
  5. Step 5: Solve for x
    x = 12,219,588.92/3,990.45
  6. Step 6: Final answer
    x = 3,062.21

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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.