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Finding the Fourth Proportional to 488,395.12, 673,991.94 and 318,531.64

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Solution

The fourth proportional to 488,395.12, 673,991.94 and 318,531.64 is: 439,578.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,395.12 : 673,991.94 = 318,531.64 : x
  2. Step 2: Convert to fraction form
    488,395.12/673,991.94 = 318,531.64/x
  3. Step 3: Cross multiply
    488,395.12x = 673,991.94 × 318,531.64
  4. Step 4: Simplify right side
    488,395.12x = 214,687,757,994.98
  5. Step 5: Solve for x
    x = 214,687,757,994.98/488,395.12
  6. Step 6: Final answer
    x = 439,578.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.