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Finding the Fourth Proportional to 657,665.40, 986,498.10 and 551,377.20

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Solution

The fourth proportional to 657,665.40, 986,498.10 and 551,377.20 is: 827,065.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,665.40 : 986,498.10 = 551,377.20 : x
  2. Step 2: Convert to fraction form
    657,665.40/986,498.10 = 551,377.20/x
  3. Step 3: Cross multiply
    657,665.40x = 986,498.10 × 551,377.20
  4. Step 4: Simplify right side
    657,665.40x = 543,932,560,183.32
  5. Step 5: Solve for x
    x = 543,932,560,183.32/657,665.40
  6. Step 6: Final answer
    x = 827,065.80

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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.