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Finding the Fourth Proportional to 291,736.40, 437,637.42 and 91,997.70

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Solution

The fourth proportional to 291,736.40, 437,637.42 and 91,997.70 is: 138,006.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,736.40 : 437,637.42 = 91,997.70 : x
  2. Step 2: Convert to fraction form
    291,736.40/437,637.42 = 91,997.70/x
  3. Step 3: Cross multiply
    291,736.40x = 437,637.42 × 91,997.70
  4. Step 4: Simplify right side
    291,736.40x = 40,261,636,073.93
  5. Step 5: Solve for x
    x = 40,261,636,073.93/291,736.40
  6. Step 6: Final answer
    x = 138,006.90

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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.