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Finding the Fourth Proportional to 309,958.44, 464,876.45 and 85,260.90

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Solution

The fourth proportional to 309,958.44, 464,876.45 and 85,260.90 is: 127,874.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,958.44 : 464,876.45 = 85,260.90 : x
  2. Step 2: Convert to fraction form
    309,958.44/464,876.45 = 85,260.90/x
  3. Step 3: Cross multiply
    309,958.44x = 464,876.45 × 85,260.90
  4. Step 4: Simplify right side
    309,958.44x = 39,635,784,089.50
  5. Step 5: Solve for x
    x = 39,635,784,089.50/309,958.44
  6. Step 6: Final answer
    x = 127,874.51

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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.