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Finding the Fourth Proportional to 665,063.40, 997,595.10 and 265,765.80

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Solution

The fourth proportional to 665,063.40, 997,595.10 and 265,765.80 is: 398,648.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,063.40 : 997,595.10 = 265,765.80 : x
  2. Step 2: Convert to fraction form
    665,063.40/997,595.10 = 265,765.80/x
  3. Step 3: Cross multiply
    665,063.40x = 997,595.10 × 265,765.80
  4. Step 4: Simplify right side
    665,063.40x = 265,126,659,827.58
  5. Step 5: Solve for x
    x = 265,126,659,827.58/665,063.40
  6. Step 6: Final answer
    x = 398,648.70

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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.