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Finding the Fourth Proportional to 865,560.80, 1,296,008.40 and 627,615.20

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Solution

The fourth proportional to 865,560.80, 1,296,008.40 and 627,615.20 is: 939,731.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,560.80 : 1,296,008.40 = 627,615.20 : x
  2. Step 2: Convert to fraction form
    865,560.80/1,296,008.40 = 627,615.20/x
  3. Step 3: Cross multiply
    865,560.80x = 1,296,008.40 × 627,615.20
  4. Step 4: Simplify right side
    865,560.80x = 813,394,571,167.68
  5. Step 5: Solve for x
    x = 813,394,571,167.68/865,560.80
  6. Step 6: Final answer
    x = 939,731.29

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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.