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Finding the Fourth Proportional to 656,961.80, 985,442.70 and 515,244.20

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Solution

The fourth proportional to 656,961.80, 985,442.70 and 515,244.20 is: 772,866.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,961.80 : 985,442.70 = 515,244.20 : x
  2. Step 2: Convert to fraction form
    656,961.80/985,442.70 = 515,244.20/x
  3. Step 3: Cross multiply
    656,961.80x = 985,442.70 × 515,244.20
  4. Step 4: Simplify right side
    656,961.80x = 507,743,635,607.34
  5. Step 5: Solve for x
    x = 507,743,635,607.34/656,961.80
  6. Step 6: Final answer
    x = 772,866.30

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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.