Home / 919,907.60-1,379,861.40-320,669.60

Finding the Fourth Proportional to 919,907.60, 1,379,861.40 and 320,669.60

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Solution

The fourth proportional to 919,907.60, 1,379,861.40 and 320,669.60 is: 481,004.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,907.60 : 1,379,861.40 = 320,669.60 : x
  2. Step 2: Convert to fraction form
    919,907.60/1,379,861.40 = 320,669.60/x
  3. Step 3: Cross multiply
    919,907.60x = 1,379,861.40 × 320,669.60
  4. Step 4: Simplify right side
    919,907.60x = 442,479,603,193.44
  5. Step 5: Solve for x
    x = 442,479,603,193.44/919,907.60
  6. Step 6: Final answer
    x = 481,004.40

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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.