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Finding the Fourth Proportional to 621,015.40, 931,523.10 and 542,283.40

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Solution

The fourth proportional to 621,015.40, 931,523.10 and 542,283.40 is: 813,425.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,015.40 : 931,523.10 = 542,283.40 : x
  2. Step 2: Convert to fraction form
    621,015.40/931,523.10 = 542,283.40/x
  3. Step 3: Cross multiply
    621,015.40x = 931,523.10 × 542,283.40
  4. Step 4: Simplify right side
    621,015.40x = 505,149,513,846.54
  5. Step 5: Solve for x
    x = 505,149,513,846.54/621,015.40
  6. Step 6: Final answer
    x = 813,425.10

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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.