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Finding the Fourth Proportional to 291,241.02, 436,861.35 and 80,878.90

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Solution

The fourth proportional to 291,241.02, 436,861.35 and 80,878.90 is: 121,318.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,241.02 : 436,861.35 = 80,878.90 : x
  2. Step 2: Convert to fraction form
    291,241.02/436,861.35 = 80,878.90/x
  3. Step 3: Cross multiply
    291,241.02x = 436,861.35 × 80,878.90
  4. Step 4: Simplify right side
    291,241.02x = 35,332,865,440.52
  5. Step 5: Solve for x
    x = 35,332,865,440.52/291,241.02
  6. Step 6: Final answer
    x = 121,318.30

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1.5x scale

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.