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Finding the Fourth Proportional to 393,612.80, 590,342.40 and 127,308.80

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Solution

The fourth proportional to 393,612.80, 590,342.40 and 127,308.80 is: 190,938.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,612.80 : 590,342.40 = 127,308.80 : x
  2. Step 2: Convert to fraction form
    393,612.80/590,342.40 = 127,308.80/x
  3. Step 3: Cross multiply
    393,612.80x = 590,342.40 × 127,308.80
  4. Step 4: Simplify right side
    393,612.80x = 75,155,782,533.12
  5. Step 5: Solve for x
    x = 75,155,782,533.12/393,612.80
  6. Step 6: Final answer
    x = 190,938.36

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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.