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Finding the Fourth Proportional to 353,679.60, 530,519.40 and 143,324.40

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Solution

The fourth proportional to 353,679.60, 530,519.40 and 143,324.40 is: 214,986.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,679.60 : 530,519.40 = 143,324.40 : x
  2. Step 2: Convert to fraction form
    353,679.60/530,519.40 = 143,324.40/x
  3. Step 3: Cross multiply
    353,679.60x = 530,519.40 × 143,324.40
  4. Step 4: Simplify right side
    353,679.60x = 76,036,374,693.36
  5. Step 5: Solve for x
    x = 76,036,374,693.36/353,679.60
  6. Step 6: Final answer
    x = 214,986.60

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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.