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Finding the Fourth Proportional to 2,289.09, 3,432.67 and 989.63

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Solution

The fourth proportional to 2,289.09, 3,432.67 and 989.63 is: 1,484.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.09 : 3,432.67 = 989.63 : x
  2. Step 2: Convert to fraction form
    2,289.09/3,432.67 = 989.63/x
  3. Step 3: Cross multiply
    2,289.09x = 3,432.67 × 989.63
  4. Step 4: Simplify right side
    2,289.09x = 3,397,073.21
  5. Step 5: Solve for x
    x = 3,397,073.21/2,289.09
  6. Step 6: Final answer
    x = 1,484.03

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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.