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Finding the Fourth Proportional to 639,000.80, 958,501.20 and 634,853.60

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Solution

The fourth proportional to 639,000.80, 958,501.20 and 634,853.60 is: 952,280.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,000.80 : 958,501.20 = 634,853.60 : x
  2. Step 2: Convert to fraction form
    639,000.80/958,501.20 = 634,853.60/x
  3. Step 3: Cross multiply
    639,000.80x = 958,501.20 × 634,853.60
  4. Step 4: Simplify right side
    639,000.80x = 608,507,937,424.32
  5. Step 5: Solve for x
    x = 608,507,937,424.32/639,000.80
  6. Step 6: Final answer
    x = 952,280.40

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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.