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Finding the Fourth Proportional to 355,711.12, 533,716.44 and 155,928.40

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Solution

The fourth proportional to 355,711.12, 533,716.44 and 155,928.40 is: 233,958.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,711.12 : 533,716.44 = 155,928.40 : x
  2. Step 2: Convert to fraction form
    355,711.12/533,716.44 = 155,928.40/x
  3. Step 3: Cross multiply
    355,711.12x = 533,716.44 × 155,928.40
  4. Step 4: Simplify right side
    355,711.12x = 83,221,550,542.90
  5. Step 5: Solve for x
    x = 83,221,550,542.90/355,711.12
  6. Step 6: Final answer
    x = 233,958.25

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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.