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Finding the Fourth Proportional to 402,191.45, 603,286.61 and 102,672.03

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Solution

The fourth proportional to 402,191.45, 603,286.61 and 102,672.03 is: 154,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,191.45 : 603,286.61 = 102,672.03 : x
  2. Step 2: Convert to fraction form
    402,191.45/603,286.61 = 102,672.03/x
  3. Step 3: Cross multiply
    402,191.45x = 603,286.61 × 102,672.03
  4. Step 4: Simplify right side
    402,191.45x = 61,940,660,407.16
  5. Step 5: Solve for x
    x = 61,940,660,407.16/402,191.45
  6. Step 6: Final answer
    x = 154,007.90

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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.