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Finding the Fourth Proportional to 721,220.53, 995,308.93 and 411,168.98

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Solution

The fourth proportional to 721,220.53, 995,308.93 and 411,168.98 is: 567,427.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,220.53 : 995,308.93 = 411,168.98 : x
  2. Step 2: Convert to fraction form
    721,220.53/995,308.93 = 411,168.98/x
  3. Step 3: Cross multiply
    721,220.53x = 995,308.93 × 411,168.98
  4. Step 4: Simplify right side
    721,220.53x = 409,240,150,500.60
  5. Step 5: Solve for x
    x = 409,240,150,500.60/721,220.53
  6. Step 6: Final answer
    x = 567,427.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.