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Finding the Fourth Proportional to 291,253.62, 436,880 and 91,591.50

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Solution

The fourth proportional to 291,253.62, 436,880 and 91,591.50 is: 137,387.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,253.62 : 436,880 = 91,591.50 : x
  2. Step 2: Convert to fraction form
    291,253.62/436,880 = 91,591.50/x
  3. Step 3: Cross multiply
    291,253.62x = 436,880 × 91,591.50
  4. Step 4: Simplify right side
    291,253.62x = 40,014,494,520
  5. Step 5: Solve for x
    x = 40,014,494,520/291,253.62
  6. Step 6: Final answer
    x = 137,387.11

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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.