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Finding the Fourth Proportional to 443,323.80, 664,985.70 and 409,109.40

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Solution

The fourth proportional to 443,323.80, 664,985.70 and 409,109.40 is: 613,664.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,323.80 : 664,985.70 = 409,109.40 : x
  2. Step 2: Convert to fraction form
    443,323.80/664,985.70 = 409,109.40/x
  3. Step 3: Cross multiply
    443,323.80x = 664,985.70 × 409,109.40
  4. Step 4: Simplify right side
    443,323.80x = 272,051,900,735.58
  5. Step 5: Solve for x
    x = 272,051,900,735.58/443,323.80
  6. Step 6: Final answer
    x = 613,664.10

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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.