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Finding the Fourth Proportional to 726,615.92, 1,089,930 and 253,300.40

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Solution

The fourth proportional to 726,615.92, 1,089,930 and 253,300.40 is: 379,952.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,615.92 : 1,089,930 = 253,300.40 : x
  2. Step 2: Convert to fraction form
    726,615.92/1,089,930 = 253,300.40/x
  3. Step 3: Cross multiply
    726,615.92x = 1,089,930 × 253,300.40
  4. Step 4: Simplify right side
    726,615.92x = 276,079,704,972
  5. Step 5: Solve for x
    x = 276,079,704,972/726,615.92
  6. Step 6: Final answer
    x = 379,952.73

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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.