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Finding the Fourth Proportional to 638,752.80, 958,129.20 and 543,764.10

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Solution

The fourth proportional to 638,752.80, 958,129.20 and 543,764.10 is: 815,646.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,752.80 : 958,129.20 = 543,764.10 : x
  2. Step 2: Convert to fraction form
    638,752.80/958,129.20 = 543,764.10/x
  3. Step 3: Cross multiply
    638,752.80x = 958,129.20 × 543,764.10
  4. Step 4: Simplify right side
    638,752.80x = 520,996,262,121.72
  5. Step 5: Solve for x
    x = 520,996,262,121.72/638,752.80
  6. Step 6: Final answer
    x = 815,646.15

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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.