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Finding the Fourth Proportional to 919,704.04, 1,379,763.70 and 280,065

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Solution

The fourth proportional to 919,704.04, 1,379,763.70 and 280,065 is: 420,160.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,704.04 : 1,379,763.70 = 280,065 : x
  2. Step 2: Convert to fraction form
    919,704.04/1,379,763.70 = 280,065/x
  3. Step 3: Cross multiply
    919,704.04x = 1,379,763.70 × 280,065
  4. Step 4: Simplify right side
    919,704.04x = 386,423,520,640.50
  5. Step 5: Solve for x
    x = 386,423,520,640.50/919,704.04
  6. Step 6: Final answer
    x = 420,160.73

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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.