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Finding the Fourth Proportional to 291,234.78, 436,851.86 and 91,572.62

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Solution

The fourth proportional to 291,234.78, 436,851.86 and 91,572.62 is: 137,358.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,234.78 : 436,851.86 = 91,572.62 : x
  2. Step 2: Convert to fraction form
    291,234.78/436,851.86 = 91,572.62/x
  3. Step 3: Cross multiply
    291,234.78x = 436,851.86 × 91,572.62
  4. Step 4: Simplify right side
    291,234.78x = 40,003,669,372.07
  5. Step 5: Solve for x
    x = 40,003,669,372.07/291,234.78
  6. Step 6: Final answer
    x = 137,358.83

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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.