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Finding the Fourth Proportional to 449,314.66, 673,639.08 and 212,380.48

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Solution

The fourth proportional to 449,314.66, 673,639.08 and 212,380.48 is: 318,413.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,314.66 : 673,639.08 = 212,380.48 : x
  2. Step 2: Convert to fraction form
    449,314.66/673,639.08 = 212,380.48/x
  3. Step 3: Cross multiply
    449,314.66x = 673,639.08 × 212,380.48
  4. Step 4: Simplify right side
    449,314.66x = 143,067,791,157.16
  5. Step 5: Solve for x
    x = 143,067,791,157.16/449,314.66
  6. Step 6: Final answer
    x = 318,413.36

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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.