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Finding the Fourth Proportional to 621,142.60, 931,713.90 and 516,166.60

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Solution

The fourth proportional to 621,142.60, 931,713.90 and 516,166.60 is: 774,249.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,142.60 : 931,713.90 = 516,166.60 : x
  2. Step 2: Convert to fraction form
    621,142.60/931,713.90 = 516,166.60/x
  3. Step 3: Cross multiply
    621,142.60x = 931,713.90 × 516,166.60
  4. Step 4: Simplify right side
    621,142.60x = 480,919,595,935.74
  5. Step 5: Solve for x
    x = 480,919,595,935.74/621,142.60
  6. Step 6: Final answer
    x = 774,249.90

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Half scale
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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.