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Finding the Fourth Proportional to 620,713.20, 930,983.40 and 200,031.60

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Solution

The fourth proportional to 620,713.20, 930,983.40 and 200,031.60 is: 300,019.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,713.20 : 930,983.40 = 200,031.60 : x
  2. Step 2: Convert to fraction form
    620,713.20/930,983.40 = 200,031.60/x
  3. Step 3: Cross multiply
    620,713.20x = 930,983.40 × 200,031.60
  4. Step 4: Simplify right side
    620,713.20x = 186,226,099,075.44
  5. Step 5: Solve for x
    x = 186,226,099,075.44/620,713.20
  6. Step 6: Final answer
    x = 300,019.56

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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.