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Finding the Fourth Proportional to 418,204.12, 627,621.64 and 193,722.06

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Solution

The fourth proportional to 418,204.12, 627,621.64 and 193,722.06 is: 290,729.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,204.12 : 627,621.64 = 193,722.06 : x
  2. Step 2: Convert to fraction form
    418,204.12/627,621.64 = 193,722.06/x
  3. Step 3: Cross multiply
    418,204.12x = 627,621.64 × 193,722.06
  4. Step 4: Simplify right side
    418,204.12x = 121,584,157,001.38
  5. Step 5: Solve for x
    x = 121,584,157,001.38/418,204.12
  6. Step 6: Final answer
    x = 290,729.22

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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.