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Finding the Fourth Proportional to 665,128.70, 997,693.05 and 455,176.70

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Solution

The fourth proportional to 665,128.70, 997,693.05 and 455,176.70 is: 682,765.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,128.70 : 997,693.05 = 455,176.70 : x
  2. Step 2: Convert to fraction form
    665,128.70/997,693.05 = 455,176.70/x
  3. Step 3: Cross multiply
    665,128.70x = 997,693.05 × 455,176.70
  4. Step 4: Simplify right side
    665,128.70x = 454,126,630,111.94
  5. Step 5: Solve for x
    x = 454,126,630,111.94/665,128.70
  6. Step 6: Final answer
    x = 682,765.05

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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.