Home / 642,115.35-963,182.41-305,190.38

Finding the Fourth Proportional to 642,115.35, 963,182.41 and 305,190.38

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Solution

The fourth proportional to 642,115.35, 963,182.41 and 305,190.38 is: 457,790.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,115.35 : 963,182.41 = 305,190.38 : x
  2. Step 2: Convert to fraction form
    642,115.35/963,182.41 = 305,190.38/x
  3. Step 3: Cross multiply
    642,115.35x = 963,182.41 × 305,190.38
  4. Step 4: Simplify right side
    642,115.35x = 293,954,007,362.20
  5. Step 5: Solve for x
    x = 293,954,007,362.20/642,115.35
  6. Step 6: Final answer
    x = 457,790.03

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Double scale
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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.