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Finding the Fourth Proportional to 657,706.80, 986,560.20 and 405,764.40

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Solution

The fourth proportional to 657,706.80, 986,560.20 and 405,764.40 is: 608,646.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,706.80 : 986,560.20 = 405,764.40 : x
  2. Step 2: Convert to fraction form
    657,706.80/986,560.20 = 405,764.40/x
  3. Step 3: Cross multiply
    657,706.80x = 986,560.20 × 405,764.40
  4. Step 4: Simplify right side
    657,706.80x = 400,311,007,616.88
  5. Step 5: Solve for x
    x = 400,311,007,616.88/657,706.80
  6. Step 6: Final answer
    x = 608,646.60

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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.