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Finding the Fourth Proportional to 312,609.25, 468,991.64 and 90,993.25

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Solution

The fourth proportional to 312,609.25, 468,991.64 and 90,993.25 is: 136,512.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,609.25 : 468,991.64 = 90,993.25 : x
  2. Step 2: Convert to fraction form
    312,609.25/468,991.64 = 90,993.25/x
  3. Step 3: Cross multiply
    312,609.25x = 468,991.64 × 90,993.25
  4. Step 4: Simplify right side
    312,609.25x = 42,675,073,546.43
  5. Step 5: Solve for x
    x = 42,675,073,546.43/312,609.25
  6. Step 6: Final answer
    x = 136,512.51

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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.