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Finding the Fourth Proportional to 613,874,220.80, 920,811,331.20 and 613,874,220.80

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Solution

The fourth proportional to 613,874,220.80, 920,811,331.20 and 613,874,220.80 is: 920,811,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,874,220.80 : 920,811,331.20 = 613,874,220.80 : x
  2. Step 2: Convert to fraction form
    613,874,220.80/920,811,331.20 = 613,874,220.80/x
  3. Step 3: Cross multiply
    613,874,220.80x = 920,811,331.20 × 613,874,220.80
  4. Step 4: Simplify right side
    613,874,220.80x = 565,262,338,444,210,688
  5. Step 5: Solve for x
    x = 565,262,338,444,210,688/613,874,220.80
  6. Step 6: Final answer
    x = 920,811,331.20

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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.