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Finding the Fourth Proportional to 443,200.80, 664,801.20 and 127,689.60

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Solution

The fourth proportional to 443,200.80, 664,801.20 and 127,689.60 is: 191,534.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,200.80 : 664,801.20 = 127,689.60 : x
  2. Step 2: Convert to fraction form
    443,200.80/664,801.20 = 127,689.60/x
  3. Step 3: Cross multiply
    443,200.80x = 664,801.20 × 127,689.60
  4. Step 4: Simplify right side
    443,200.80x = 84,888,199,307.52
  5. Step 5: Solve for x
    x = 84,888,199,307.52/443,200.80
  6. Step 6: Final answer
    x = 191,534.40

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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.