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Finding the Fourth Proportional to 617,958.56, 927,440.67 and 318,524.78

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Solution

The fourth proportional to 617,958.56, 927,440.67 and 318,524.78 is: 478,046.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,958.56 : 927,440.67 = 318,524.78 : x
  2. Step 2: Convert to fraction form
    617,958.56/927,440.67 = 318,524.78/x
  3. Step 3: Cross multiply
    617,958.56x = 927,440.67 × 318,524.78
  4. Step 4: Simplify right side
    617,958.56x = 295,412,830,737.60
  5. Step 5: Solve for x
    x = 295,412,830,737.60/617,958.56
  6. Step 6: Final answer
    x = 478,046.35

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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.