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Finding the Fourth Proportional to 291,273.55, 436,929.15 and 91,601.66

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Solution

The fourth proportional to 291,273.55, 436,929.15 and 91,601.66 is: 137,408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,273.55 : 436,929.15 = 91,601.66 : x
  2. Step 2: Convert to fraction form
    291,273.55/436,929.15 = 91,601.66/x
  3. Step 3: Cross multiply
    291,273.55x = 436,929.15 × 91,601.66
  4. Step 4: Simplify right side
    291,273.55x = 40,023,436,878.22
  5. Step 5: Solve for x
    x = 40,023,436,878.22/291,273.55
  6. Step 6: Final answer
    x = 137,408.42

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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.