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Finding the Fourth Proportional to 312,638.84, 468,958.48 and 75,979.92

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Solution

The fourth proportional to 312,638.84, 468,958.48 and 75,979.92 is: 113,969.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,638.84 : 468,958.48 = 75,979.92 : x
  2. Step 2: Convert to fraction form
    312,638.84/468,958.48 = 75,979.92/x
  3. Step 3: Cross multiply
    312,638.84x = 468,958.48 × 75,979.92
  4. Step 4: Simplify right side
    312,638.84x = 35,631,427,793.72
  5. Step 5: Solve for x
    x = 35,631,427,793.72/312,638.84
  6. Step 6: Final answer
    x = 113,969.93

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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.