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Finding the Fourth Proportional to 393,561.20, 590,341.80 and 156,940.40

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Solution

The fourth proportional to 393,561.20, 590,341.80 and 156,940.40 is: 235,410.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,561.20 : 590,341.80 = 156,940.40 : x
  2. Step 2: Convert to fraction form
    393,561.20/590,341.80 = 156,940.40/x
  3. Step 3: Cross multiply
    393,561.20x = 590,341.80 × 156,940.40
  4. Step 4: Simplify right side
    393,561.20x = 92,648,478,228.72
  5. Step 5: Solve for x
    x = 92,648,478,228.72/393,561.20
  6. Step 6: Final answer
    x = 235,410.60

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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.