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Finding the Fourth Proportional to 7,420,210.80, 10,396,693.20 and 7,420,210.80

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Solution

The fourth proportional to 7,420,210.80, 10,396,693.20 and 7,420,210.80 is: 10,396,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,420,210.80 : 10,396,693.20 = 7,420,210.80 : x
  2. Step 2: Convert to fraction form
    7,420,210.80/10,396,693.20 = 7,420,210.80/x
  3. Step 3: Cross multiply
    7,420,210.80x = 10,396,693.20 × 7,420,210.80
  4. Step 4: Simplify right side
    7,420,210.80x = 77,145,655,166,926.55
  5. Step 5: Solve for x
    x = 77,145,655,166,926.55/7,420,210.80
  6. Step 6: Final answer
    x = 10,396,693.20

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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 (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.