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Finding the Fourth Proportional to 634,606.20, 951,662.34 and 318,843

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Solution

The fourth proportional to 634,606.20, 951,662.34 and 318,843 is: 478,140.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    634,606.20 : 951,662.34 = 318,843 : x
  2. Step 2: Convert to fraction form
    634,606.20/951,662.34 = 318,843/x
  3. Step 3: Cross multiply
    634,606.20x = 951,662.34 × 318,843
  4. Step 4: Simplify right side
    634,606.20x = 303,430,875,472.62
  5. Step 5: Solve for x
    x = 303,430,875,472.62/634,606.20
  6. Step 6: Final answer
    x = 478,140.42

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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.