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Finding the Fourth Proportional to 656,983.80, 985,475.70 and 515,266.20

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Solution

The fourth proportional to 656,983.80, 985,475.70 and 515,266.20 is: 772,899.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,983.80 : 985,475.70 = 515,266.20 : x
  2. Step 2: Convert to fraction form
    656,983.80/985,475.70 = 515,266.20/x
  3. Step 3: Cross multiply
    656,983.80x = 985,475.70 × 515,266.20
  4. Step 4: Simplify right side
    656,983.80x = 507,782,319,131.34
  5. Step 5: Solve for x
    x = 507,782,319,131.34/656,983.80
  6. Step 6: Final answer
    x = 772,899.30

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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.