Home / 919,021.60-1,378,532.88-287,984.80

Finding the Fourth Proportional to 919,021.60, 1,378,532.88 and 287,984.80

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Solution

The fourth proportional to 919,021.60, 1,378,532.88 and 287,984.80 is: 431,977.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,021.60 : 1,378,532.88 = 287,984.80 : x
  2. Step 2: Convert to fraction form
    919,021.60/1,378,532.88 = 287,984.80/x
  3. Step 3: Cross multiply
    919,021.60x = 1,378,532.88 × 287,984.80
  4. Step 4: Simplify right side
    919,021.60x = 396,996,515,740.22
  5. Step 5: Solve for x
    x = 396,996,515,740.22/919,021.60
  6. Step 6: Final answer
    x = 431,977.35

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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.