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Finding the Fourth Proportional to 291,534.56, 436,876.32 and 129,232.80

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Solution

The fourth proportional to 291,534.56, 436,876.32 and 129,232.80 is: 193,660.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,534.56 : 436,876.32 = 129,232.80 : x
  2. Step 2: Convert to fraction form
    291,534.56/436,876.32 = 129,232.80/x
  3. Step 3: Cross multiply
    291,534.56x = 436,876.32 × 129,232.80
  4. Step 4: Simplify right side
    291,534.56x = 56,458,750,087.30
  5. Step 5: Solve for x
    x = 56,458,750,087.30/291,534.56
  6. Step 6: Final answer
    x = 193,660.57

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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.