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Finding the Fourth Proportional to 393,639.40, 590,535.90 and 168,999.40

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Solution

The fourth proportional to 393,639.40, 590,535.90 and 168,999.40 is: 253,532.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,639.40 : 590,535.90 = 168,999.40 : x
  2. Step 2: Convert to fraction form
    393,639.40/590,535.90 = 168,999.40/x
  3. Step 3: Cross multiply
    393,639.40x = 590,535.90 × 168,999.40
  4. Step 4: Simplify right side
    393,639.40x = 99,800,212,778.46
  5. Step 5: Solve for x
    x = 99,800,212,778.46/393,639.40
  6. Step 6: Final answer
    x = 253,532.07

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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.