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Finding the Fourth Proportional to 279,944.10, 419,916.15 and 90,404.10

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Solution

The fourth proportional to 279,944.10, 419,916.15 and 90,404.10 is: 135,606.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,944.10 : 419,916.15 = 90,404.10 : x
  2. Step 2: Convert to fraction form
    279,944.10/419,916.15 = 90,404.10/x
  3. Step 3: Cross multiply
    279,944.10x = 419,916.15 × 90,404.10
  4. Step 4: Simplify right side
    279,944.10x = 37,962,141,616.22
  5. Step 5: Solve for x
    x = 37,962,141,616.22/279,944.10
  6. Step 6: Final answer
    x = 135,606.15

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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.