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Finding the Fourth Proportional to 543,339.40, 815,009.10 and 534,008.20

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Solution

The fourth proportional to 543,339.40, 815,009.10 and 534,008.20 is: 801,012.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,339.40 : 815,009.10 = 534,008.20 : x
  2. Step 2: Convert to fraction form
    543,339.40/815,009.10 = 534,008.20/x
  3. Step 3: Cross multiply
    543,339.40x = 815,009.10 × 534,008.20
  4. Step 4: Simplify right side
    543,339.40x = 435,221,542,474.62
  5. Step 5: Solve for x
    x = 435,221,542,474.62/543,339.40
  6. Step 6: Final answer
    x = 801,012.30

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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.