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Finding the Fourth Proportional to 189,440.80, 284,161.20 and 155,615.20

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Solution

The fourth proportional to 189,440.80, 284,161.20 and 155,615.20 is: 233,422.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,440.80 : 284,161.20 = 155,615.20 : x
  2. Step 2: Convert to fraction form
    189,440.80/284,161.20 = 155,615.20/x
  3. Step 3: Cross multiply
    189,440.80x = 284,161.20 × 155,615.20
  4. Step 4: Simplify right side
    189,440.80x = 44,219,801,970.24
  5. Step 5: Solve for x
    x = 44,219,801,970.24/189,440.80
  6. Step 6: Final answer
    x = 233,422.80

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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.