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Finding the Fourth Proportional to 657,764.80, 986,647.20 and 342,836.80

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Solution

The fourth proportional to 657,764.80, 986,647.20 and 342,836.80 is: 514,255.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,764.80 : 986,647.20 = 342,836.80 : x
  2. Step 2: Convert to fraction form
    657,764.80/986,647.20 = 342,836.80/x
  3. Step 3: Cross multiply
    657,764.80x = 986,647.20 × 342,836.80
  4. Step 4: Simplify right side
    657,764.80x = 338,258,968,776.96
  5. Step 5: Solve for x
    x = 338,258,968,776.96/657,764.80
  6. Step 6: Final answer
    x = 514,255.20

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Double scale
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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.