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Finding the Fourth Proportional to 656,369.28, 905,790.36 and 354,563.28

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Solution

The fourth proportional to 656,369.28, 905,790.36 and 354,563.28 is: 489,297.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,369.28 : 905,790.36 = 354,563.28 : x
  2. Step 2: Convert to fraction form
    656,369.28/905,790.36 = 354,563.28/x
  3. Step 3: Cross multiply
    656,369.28x = 905,790.36 × 354,563.28
  4. Step 4: Simplify right side
    656,369.28x = 321,160,001,033.98
  5. Step 5: Solve for x
    x = 321,160,001,033.98/656,369.28
  6. Step 6: Final answer
    x = 489,297.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.