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Finding the Fourth Proportional to 647,999.80, 971,999.70 and 577,958.20

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Solution

The fourth proportional to 647,999.80, 971,999.70 and 577,958.20 is: 866,937.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,999.80 : 971,999.70 = 577,958.20 : x
  2. Step 2: Convert to fraction form
    647,999.80/971,999.70 = 577,958.20/x
  3. Step 3: Cross multiply
    647,999.80x = 971,999.70 × 577,958.20
  4. Step 4: Simplify right side
    647,999.80x = 561,775,197,012.54
  5. Step 5: Solve for x
    x = 561,775,197,012.54/647,999.80
  6. Step 6: Final answer
    x = 866,937.30

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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.