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Finding the Fourth Proportional to 393,749.80, 590,235.90 and 156,776.20

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Solution

The fourth proportional to 393,749.80, 590,235.90 and 156,776.20 is: 235,009.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,749.80 : 590,235.90 = 156,776.20 : x
  2. Step 2: Convert to fraction form
    393,749.80/590,235.90 = 156,776.20/x
  3. Step 3: Cross multiply
    393,749.80x = 590,235.90 × 156,776.20
  4. Step 4: Simplify right side
    393,749.80x = 92,534,941,505.58
  5. Step 5: Solve for x
    x = 92,534,941,505.58/393,749.80
  6. Step 6: Final answer
    x = 235,009.49

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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.