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Finding the Fourth Proportional to 2,989.45, 4,480.07 and 1,891.85

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Solution

The fourth proportional to 2,989.45, 4,480.07 and 1,891.85 is: 2,835.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.45 : 4,480.07 = 1,891.85 : x
  2. Step 2: Convert to fraction form
    2,989.45/4,480.07 = 1,891.85/x
  3. Step 3: Cross multiply
    2,989.45x = 4,480.07 × 1,891.85
  4. Step 4: Simplify right side
    2,989.45x = 8,475,612.46
  5. Step 5: Solve for x
    x = 8,475,612.46/2,989.45
  6. Step 6: Final answer
    x = 2,835.18

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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.