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Finding the Fourth Proportional to 627,839.67, 866,846.63 and 421,417.67

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Solution

The fourth proportional to 627,839.67, 866,846.63 and 421,417.67 is: 581,843.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,839.67 : 866,846.63 = 421,417.67 : x
  2. Step 2: Convert to fraction form
    627,839.67/866,846.63 = 421,417.67/x
  3. Step 3: Cross multiply
    627,839.67x = 866,846.63 × 421,417.67
  4. Step 4: Simplify right side
    627,839.67x = 365,304,483,781.26
  5. Step 5: Solve for x
    x = 365,304,483,781.26/627,839.67
  6. Step 6: Final answer
    x = 581,843.58

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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.