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Finding the Fourth Proportional to 291,735.40, 437,635.92 and 91,996.69

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Solution

The fourth proportional to 291,735.40, 437,635.92 and 91,996.69 is: 138,005.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,735.40 : 437,635.92 = 91,996.69 : x
  2. Step 2: Convert to fraction form
    291,735.40/437,635.92 = 91,996.69/x
  3. Step 3: Cross multiply
    291,735.40x = 437,635.92 × 91,996.69
  4. Step 4: Simplify right side
    291,735.40x = 40,261,056,065.10
  5. Step 5: Solve for x
    x = 40,261,056,065.10/291,735.40
  6. Step 6: Final answer
    x = 138,005.38

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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.