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Finding the Fourth Proportional to 603,373.96, 905,257.54 and 287,789.80

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Solution

The fourth proportional to 603,373.96, 905,257.54 and 287,789.80 is: 431,778.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,373.96 : 905,257.54 = 287,789.80 : x
  2. Step 2: Convert to fraction form
    603,373.96/905,257.54 = 287,789.80/x
  3. Step 3: Cross multiply
    603,373.96x = 905,257.54 × 287,789.80
  4. Step 4: Simplify right side
    603,373.96x = 260,523,886,385.09
  5. Step 5: Solve for x
    x = 260,523,886,385.09/603,373.96
  6. Step 6: Final answer
    x = 431,778.47

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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.