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Finding the Fourth Proportional to 621,818.70, 932,728.05 and 486,516.30

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Solution

The fourth proportional to 621,818.70, 932,728.05 and 486,516.30 is: 729,774.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,818.70 : 932,728.05 = 486,516.30 : x
  2. Step 2: Convert to fraction form
    621,818.70/932,728.05 = 486,516.30/x
  3. Step 3: Cross multiply
    621,818.70x = 932,728.05 × 486,516.30
  4. Step 4: Simplify right side
    621,818.70x = 453,787,399,792.22
  5. Step 5: Solve for x
    x = 453,787,399,792.22/621,818.70
  6. Step 6: Final answer
    x = 729,774.45

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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.