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Finding the Fourth Proportional to 291,190.64, 436,788.38 and 91,506.56

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Solution

The fourth proportional to 291,190.64, 436,788.38 and 91,506.56 is: 137,260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,190.64 : 436,788.38 = 91,506.56 : x
  2. Step 2: Convert to fraction form
    291,190.64/436,788.38 = 91,506.56/x
  3. Step 3: Cross multiply
    291,190.64x = 436,788.38 × 91,506.56
  4. Step 4: Simplify right side
    291,190.64x = 39,969,002,101.77
  5. Step 5: Solve for x
    x = 39,969,002,101.77/291,190.64
  6. Step 6: Final answer
    x = 137,260.60

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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.