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Finding the Fourth Proportional to 863,391.98, 1,294,349.45 and 331,294.88

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Solution

The fourth proportional to 863,391.98, 1,294,349.45 and 331,294.88 is: 496,658.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,391.98 : 1,294,349.45 = 331,294.88 : x
  2. Step 2: Convert to fraction form
    863,391.98/1,294,349.45 = 331,294.88/x
  3. Step 3: Cross multiply
    863,391.98x = 1,294,349.45 × 331,294.88
  4. Step 4: Simplify right side
    863,391.98x = 428,811,337,587.59
  5. Step 5: Solve for x
    x = 428,811,337,587.59/863,391.98
  6. Step 6: Final answer
    x = 496,658.93

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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.