Home / 919,939.60-1,379,909.40-320,701.60

Finding the Fourth Proportional to 919,939.60, 1,379,909.40 and 320,701.60

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Solution

The fourth proportional to 919,939.60, 1,379,909.40 and 320,701.60 is: 481,052.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,939.60 : 1,379,909.40 = 320,701.60 : x
  2. Step 2: Convert to fraction form
    919,939.60/1,379,909.40 = 320,701.60/x
  3. Step 3: Cross multiply
    919,939.60x = 1,379,909.40 × 320,701.60
  4. Step 4: Simplify right side
    919,939.60x = 442,539,152,435.04
  5. Step 5: Solve for x
    x = 442,539,152,435.04/919,939.60
  6. Step 6: Final answer
    x = 481,052.40

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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.