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Finding the Fourth Proportional to 490,138.92, 734,685.66 and 279,322.92

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Solution

The fourth proportional to 490,138.92, 734,685.66 and 279,322.92 is: 418,686.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,138.92 : 734,685.66 = 279,322.92 : x
  2. Step 2: Convert to fraction form
    490,138.92/734,685.66 = 279,322.92/x
  3. Step 3: Cross multiply
    490,138.92x = 734,685.66 × 279,322.92
  4. Step 4: Simplify right side
    490,138.92x = 205,214,543,833.33
  5. Step 5: Solve for x
    x = 205,214,543,833.33/490,138.92
  6. Step 6: Final answer
    x = 418,686.49

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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.