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Finding the Fourth Proportional to 443,485.10, 665,227.65 and 127,952.30

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Solution

The fourth proportional to 443,485.10, 665,227.65 and 127,952.30 is: 191,928.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,485.10 : 665,227.65 = 127,952.30 : x
  2. Step 2: Convert to fraction form
    443,485.10/665,227.65 = 127,952.30/x
  3. Step 3: Cross multiply
    443,485.10x = 665,227.65 × 127,952.30
  4. Step 4: Simplify right side
    443,485.10x = 85,117,407,841.10
  5. Step 5: Solve for x
    x = 85,117,407,841.10/443,485.10
  6. Step 6: Final answer
    x = 191,928.45

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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.