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Finding the Fourth Proportional to 347,144.80, 520,328.40 and 197,456.80

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Solution

The fourth proportional to 347,144.80, 520,328.40 and 197,456.80 is: 295,964.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,144.80 : 520,328.40 = 197,456.80 : x
  2. Step 2: Convert to fraction form
    347,144.80/520,328.40 = 197,456.80/x
  3. Step 3: Cross multiply
    347,144.80x = 520,328.40 × 197,456.80
  4. Step 4: Simplify right side
    347,144.80x = 102,742,380,813.12
  5. Step 5: Solve for x
    x = 102,742,380,813.12/347,144.80
  6. Step 6: Final answer
    x = 295,964.05

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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.