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Finding the Fourth Proportional to 422,992.62, 634,532.67 and 142,531.74

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Solution

The fourth proportional to 422,992.62, 634,532.67 and 142,531.74 is: 213,812.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,992.62 : 634,532.67 = 142,531.74 : x
  2. Step 2: Convert to fraction form
    422,992.62/634,532.67 = 142,531.74/x
  3. Step 3: Cross multiply
    422,992.62x = 634,532.67 × 142,531.74
  4. Step 4: Simplify right side
    422,992.62x = 90,441,045,541.95
  5. Step 5: Solve for x
    x = 90,441,045,541.95/422,992.62
  6. Step 6: Final answer
    x = 213,812.35

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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.