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Finding the Fourth Proportional to 318,309.75, 477,495.81 and 115,960.86

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Solution

The fourth proportional to 318,309.75, 477,495.81 and 115,960.86 is: 173,952.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,309.75 : 477,495.81 = 115,960.86 : x
  2. Step 2: Convert to fraction form
    318,309.75/477,495.81 = 115,960.86/x
  3. Step 3: Cross multiply
    318,309.75x = 477,495.81 × 115,960.86
  4. Step 4: Simplify right side
    318,309.75x = 55,370,824,774.00
  5. Step 5: Solve for x
    x = 55,370,824,774.00/318,309.75
  6. Step 6: Final answer
    x = 173,952.65

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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.