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Finding the Fourth Proportional to 339,961.80, 509,942.70 and 303,220.20

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Solution

The fourth proportional to 339,961.80, 509,942.70 and 303,220.20 is: 454,830.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,961.80 : 509,942.70 = 303,220.20 : x
  2. Step 2: Convert to fraction form
    339,961.80/509,942.70 = 303,220.20/x
  3. Step 3: Cross multiply
    339,961.80x = 509,942.70 × 303,220.20
  4. Step 4: Simplify right side
    339,961.80x = 154,624,927,482.54
  5. Step 5: Solve for x
    x = 154,624,927,482.54/339,961.80
  6. Step 6: Final answer
    x = 454,830.30

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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.