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Finding the Fourth Proportional to 665,141.40, 997,712.10 and 628,399.80

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Solution

The fourth proportional to 665,141.40, 997,712.10 and 628,399.80 is: 942,599.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,141.40 : 997,712.10 = 628,399.80 : x
  2. Step 2: Convert to fraction form
    665,141.40/997,712.10 = 628,399.80/x
  3. Step 3: Cross multiply
    665,141.40x = 997,712.10 × 628,399.80
  4. Step 4: Simplify right side
    665,141.40x = 626,962,084,097.58
  5. Step 5: Solve for x
    x = 626,962,084,097.58/665,141.40
  6. Step 6: Final answer
    x = 942,599.70

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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.