Home / 643,771.20-965,829.60-574,132.80

Finding the Fourth Proportional to 643,771.20, 965,829.60 and 574,132.80

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Solution

The fourth proportional to 643,771.20, 965,829.60 and 574,132.80 is: 861,353.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,771.20 : 965,829.60 = 574,132.80 : x
  2. Step 2: Convert to fraction form
    643,771.20/965,829.60 = 574,132.80/x
  3. Step 3: Cross multiply
    643,771.20x = 965,829.60 × 574,132.80
  4. Step 4: Simplify right side
    643,771.20x = 554,514,452,570.88
  5. Step 5: Solve for x
    x = 554,514,452,570.88/643,771.20
  6. Step 6: Final answer
    x = 861,353.31

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Double scale
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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.