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Finding the Fourth Proportional to 318,338.60, 477,513.12 and 107,981.96

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Solution

The fourth proportional to 318,338.60, 477,513.12 and 107,981.96 is: 161,974.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,338.60 : 477,513.12 = 107,981.96 : x
  2. Step 2: Convert to fraction form
    318,338.60/477,513.12 = 107,981.96/x
  3. Step 3: Cross multiply
    318,338.60x = 477,513.12 × 107,981.96
  4. Step 4: Simplify right side
    318,338.60x = 51,562,802,623.32
  5. Step 5: Solve for x
    x = 51,562,802,623.32/318,338.60
  6. Step 6: Final answer
    x = 161,974.71

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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.