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Finding the Fourth Proportional to 190,438.80, 285,658.20 and 57,339.60

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Solution

The fourth proportional to 190,438.80, 285,658.20 and 57,339.60 is: 86,009.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,438.80 : 285,658.20 = 57,339.60 : x
  2. Step 2: Convert to fraction form
    190,438.80/285,658.20 = 57,339.60/x
  3. Step 3: Cross multiply
    190,438.80x = 285,658.20 × 57,339.60
  4. Step 4: Simplify right side
    190,438.80x = 16,379,526,924.72
  5. Step 5: Solve for x
    x = 16,379,526,924.72/190,438.80
  6. Step 6: Final answer
    x = 86,009.40

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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.