Home / 1,989.45-2,990.93-1,626.87

Finding the Fourth Proportional to 1,989.45, 2,990.93 and 1,626.87

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Solution

The fourth proportional to 1,989.45, 2,990.93 and 1,626.87 is: 2,445.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.45 : 2,990.93 = 1,626.87 : x
  2. Step 2: Convert to fraction form
    1,989.45/2,990.93 = 1,626.87/x
  3. Step 3: Cross multiply
    1,989.45x = 2,990.93 × 1,626.87
  4. Step 4: Simplify right side
    1,989.45x = 4,865,846.15
  5. Step 5: Solve for x
    x = 4,865,846.15/1,989.45
  6. Step 6: Final answer
    x = 2,445.82

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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.