Home / 2,289.15-3,433.18-989.91

Finding the Fourth Proportional to 2,289.15, 3,433.18 and 989.91

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Solution

The fourth proportional to 2,289.15, 3,433.18 and 989.91 is: 1,484.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.15 : 3,433.18 = 989.91 : x
  2. Step 2: Convert to fraction form
    2,289.15/3,433.18 = 989.91/x
  3. Step 3: Cross multiply
    2,289.15x = 3,433.18 × 989.91
  4. Step 4: Simplify right side
    2,289.15x = 3,398,539.21
  5. Step 5: Solve for x
    x = 3,398,539.21/2,289.15
  6. Step 6: Final answer
    x = 1,484.63

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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.