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Finding the Fourth Proportional to 353,805.20, 530,740.20 and 143,399.60

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Solution

The fourth proportional to 353,805.20, 530,740.20 and 143,399.60 is: 215,112.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,805.20 : 530,740.20 = 143,399.60 : x
  2. Step 2: Convert to fraction form
    353,805.20/530,740.20 = 143,399.60/x
  3. Step 3: Cross multiply
    353,805.20x = 530,740.20 × 143,399.60
  4. Step 4: Simplify right side
    353,805.20x = 76,107,932,383.92
  5. Step 5: Solve for x
    x = 76,107,932,383.92/353,805.20
  6. Step 6: Final answer
    x = 215,112.53

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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.