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Finding the Fourth Proportional to 422,328.11, 632,019.51 and 345,539.19

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Solution

The fourth proportional to 422,328.11, 632,019.51 and 345,539.19 is: 517,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,328.11 : 632,019.51 = 345,539.19 : x
  2. Step 2: Convert to fraction form
    422,328.11/632,019.51 = 345,539.19/x
  3. Step 3: Cross multiply
    422,328.11x = 632,019.51 × 345,539.19
  4. Step 4: Simplify right side
    422,328.11x = 218,387,509,549.60
  5. Step 5: Solve for x
    x = 218,387,509,549.60/422,328.11
  6. Step 6: Final answer
    x = 517,103.90

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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.