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Finding the Fourth Proportional to 318,558.72, 477,838.08 and 131,364.48

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Solution

The fourth proportional to 318,558.72, 477,838.08 and 131,364.48 is: 197,046.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,558.72 : 477,838.08 = 131,364.48 : x
  2. Step 2: Convert to fraction form
    318,558.72/477,838.08 = 131,364.48/x
  3. Step 3: Cross multiply
    318,558.72x = 477,838.08 × 131,364.48
  4. Step 4: Simplify right side
    318,558.72x = 62,770,950,903.40
  5. Step 5: Solve for x
    x = 62,770,950,903.40/318,558.72
  6. Step 6: Final answer
    x = 197,046.72

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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.