Home / 919,979.55-1,379,969.33-415,110.60

Finding the Fourth Proportional to 919,979.55, 1,379,969.33 and 415,110.60

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Solution

The fourth proportional to 919,979.55, 1,379,969.33 and 415,110.60 is: 622,665.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,979.55 : 1,379,969.33 = 415,110.60 : x
  2. Step 2: Convert to fraction form
    919,979.55/1,379,969.33 = 415,110.60/x
  3. Step 3: Cross multiply
    919,979.55x = 1,379,969.33 × 415,110.60
  4. Step 4: Simplify right side
    919,979.55x = 572,839,894,482.35
  5. Step 5: Solve for x
    x = 572,839,894,482.35/919,979.55
  6. Step 6: Final answer
    x = 622,665.90

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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.