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Finding the Fourth Proportional to 291,012.88, 436,524.72 and 91,328.80

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Solution

The fourth proportional to 291,012.88, 436,524.72 and 91,328.80 is: 136,994.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,012.88 : 436,524.72 = 91,328.80 : x
  2. Step 2: Convert to fraction form
    291,012.88/436,524.72 = 91,328.80/x
  3. Step 3: Cross multiply
    291,012.88x = 436,524.72 × 91,328.80
  4. Step 4: Simplify right side
    291,012.88x = 39,867,278,847.94
  5. Step 5: Solve for x
    x = 39,867,278,847.94/291,012.88
  6. Step 6: Final answer
    x = 136,994.89

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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.