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Finding the Fourth Proportional to 422,499.80, 633,845.70 and 142,045.40

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Solution

The fourth proportional to 422,499.80, 633,845.70 and 142,045.40 is: 213,100.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,499.80 : 633,845.70 = 142,045.40 : x
  2. Step 2: Convert to fraction form
    422,499.80/633,845.70 = 142,045.40/x
  3. Step 3: Cross multiply
    422,499.80x = 633,845.70 × 142,045.40
  4. Step 4: Simplify right side
    422,499.80x = 90,034,865,994.78
  5. Step 5: Solve for x
    x = 90,034,865,994.78/422,499.80
  6. Step 6: Final answer
    x = 213,100.38

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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.