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Finding the Fourth Proportional to 657,559.20, 986,338.80 and 419,613.60

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Solution

The fourth proportional to 657,559.20, 986,338.80 and 419,613.60 is: 629,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,559.20 : 986,338.80 = 419,613.60 : x
  2. Step 2: Convert to fraction form
    657,559.20/986,338.80 = 419,613.60/x
  3. Step 3: Cross multiply
    657,559.20x = 986,338.80 × 419,613.60
  4. Step 4: Simplify right side
    657,559.20x = 413,881,174,687.68
  5. Step 5: Solve for x
    x = 413,881,174,687.68/657,559.20
  6. Step 6: Final answer
    x = 629,420.40

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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.