Home / 816,109.20-1,224,163.80-438,195.60

Finding the Fourth Proportional to 816,109.20, 1,224,163.80 and 438,195.60

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Solution

The fourth proportional to 816,109.20, 1,224,163.80 and 438,195.60 is: 657,293.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    816,109.20 : 1,224,163.80 = 438,195.60 : x
  2. Step 2: Convert to fraction form
    816,109.20/1,224,163.80 = 438,195.60/x
  3. Step 3: Cross multiply
    816,109.20x = 1,224,163.80 × 438,195.60
  4. Step 4: Simplify right side
    816,109.20x = 536,423,190,839.28
  5. Step 5: Solve for x
    x = 536,423,190,839.28/816,109.20
  6. Step 6: Final answer
    x = 657,293.40

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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.