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Finding the Fourth Proportional to 393,992.80, 590,816.40 and 157,256.80

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Solution

The fourth proportional to 393,992.80, 590,816.40 and 157,256.80 is: 235,816.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,992.80 : 590,816.40 = 157,256.80 : x
  2. Step 2: Convert to fraction form
    393,992.80/590,816.40 = 157,256.80/x
  3. Step 3: Cross multiply
    393,992.80x = 590,816.40 × 157,256.80
  4. Step 4: Simplify right side
    393,992.80x = 92,909,896,451.52
  5. Step 5: Solve for x
    x = 92,909,896,451.52/393,992.80
  6. Step 6: Final answer
    x = 235,816.23

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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.