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Finding the Fourth Proportional to 347,355.60, 521,206.20 and 137,000.40

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Solution

The fourth proportional to 347,355.60, 521,206.20 and 137,000.40 is: 205,568.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,355.60 : 521,206.20 = 137,000.40 : x
  2. Step 2: Convert to fraction form
    347,355.60/521,206.20 = 137,000.40/x
  3. Step 3: Cross multiply
    347,355.60x = 521,206.20 × 137,000.40
  4. Step 4: Simplify right side
    347,355.60x = 71,405,457,882.48
  5. Step 5: Solve for x
    x = 71,405,457,882.48/347,355.60
  6. Step 6: Final answer
    x = 205,568.75

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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.