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Finding the Fourth Proportional to 393,918.96, 590,879.40 and 157,280.88

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Solution

The fourth proportional to 393,918.96, 590,879.40 and 157,280.88 is: 235,921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,918.96 : 590,879.40 = 157,280.88 : x
  2. Step 2: Convert to fraction form
    393,918.96/590,879.40 = 157,280.88/x
  3. Step 3: Cross multiply
    393,918.96x = 590,879.40 × 157,280.88
  4. Step 4: Simplify right side
    393,918.96x = 92,934,032,005.87
  5. Step 5: Solve for x
    x = 92,934,032,005.87/393,918.96
  6. Step 6: Final answer
    x = 235,921.70

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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.