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Finding the Fourth Proportional to 422,390.72, 633,680.64 and 141,900.32

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Solution

The fourth proportional to 422,390.72, 633,680.64 and 141,900.32 is: 212,882.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,390.72 : 633,680.64 = 141,900.32 : x
  2. Step 2: Convert to fraction form
    422,390.72/633,680.64 = 141,900.32/x
  3. Step 3: Cross multiply
    422,390.72x = 633,680.64 × 141,900.32
  4. Step 4: Simplify right side
    422,390.72x = 89,919,485,593.80
  5. Step 5: Solve for x
    x = 89,919,485,593.80/422,390.72
  6. Step 6: Final answer
    x = 212,882.25

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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.