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Finding the Fourth Proportional to 621,809.70, 932,714.55 and 201,128.10

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Solution

The fourth proportional to 621,809.70, 932,714.55 and 201,128.10 is: 301,692.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,809.70 : 932,714.55 = 201,128.10 : x
  2. Step 2: Convert to fraction form
    621,809.70/932,714.55 = 201,128.10/x
  3. Step 3: Cross multiply
    621,809.70x = 932,714.55 × 201,128.10
  4. Step 4: Simplify right side
    621,809.70x = 187,595,105,283.86
  5. Step 5: Solve for x
    x = 187,595,105,283.86/621,809.70
  6. Step 6: Final answer
    x = 301,692.15

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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.