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Finding the Fourth Proportional to 2,128.20, 3,192.06 and 589

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Solution

The fourth proportional to 2,128.20, 3,192.06 and 589 is: 883.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.20 : 3,192.06 = 589 : x
  2. Step 2: Convert to fraction form
    2,128.20/3,192.06 = 589/x
  3. Step 3: Cross multiply
    2,128.20x = 3,192.06 × 589
  4. Step 4: Simplify right side
    2,128.20x = 1,880,123.34
  5. Step 5: Solve for x
    x = 1,880,123.34/2,128.20
  6. Step 6: Final answer
    x = 883.43

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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.