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Finding the Fourth Proportional to 309,896.80, 464,845.20 and 291,234.40

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Solution

The fourth proportional to 309,896.80, 464,845.20 and 291,234.40 is: 436,851.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,896.80 : 464,845.20 = 291,234.40 : x
  2. Step 2: Convert to fraction form
    309,896.80/464,845.20 = 291,234.40/x
  3. Step 3: Cross multiply
    309,896.80x = 464,845.20 × 291,234.40
  4. Step 4: Simplify right side
    309,896.80x = 135,378,912,914.88
  5. Step 5: Solve for x
    x = 135,378,912,914.88/309,896.80
  6. Step 6: Final answer
    x = 436,851.60

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Similar ratio
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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.