Home / 2,289.45-3,433.35-990.21

Finding the Fourth Proportional to 2,289.45, 3,433.35 and 990.21

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Solution

The fourth proportional to 2,289.45, 3,433.35 and 990.21 is: 1,484.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.45 : 3,433.35 = 990.21 : x
  2. Step 2: Convert to fraction form
    2,289.45/3,433.35 = 990.21/x
  3. Step 3: Cross multiply
    2,289.45x = 3,433.35 × 990.21
  4. Step 4: Simplify right side
    2,289.45x = 3,399,737.50
  5. Step 5: Solve for x
    x = 3,399,737.50/2,289.45
  6. Step 6: Final answer
    x = 1,484.96

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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.