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Finding the Fourth Proportional to 422,989.09, 634,482.11 and 103,137.30

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Solution

The fourth proportional to 422,989.09, 634,482.11 and 103,137.30 is: 154,705.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,989.09 : 634,482.11 = 103,137.30 : x
  2. Step 2: Convert to fraction form
    422,989.09/634,482.11 = 103,137.30/x
  3. Step 3: Cross multiply
    422,989.09x = 634,482.11 × 103,137.30
  4. Step 4: Simplify right side
    422,989.09x = 65,438,771,981.55
  5. Step 5: Solve for x
    x = 65,438,771,981.55/422,989.09
  6. Step 6: Final answer
    x = 154,705.58

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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.