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Finding the Fourth Proportional to 488,396.12, 673,993.32 and 318,532.64

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Solution

The fourth proportional to 488,396.12, 673,993.32 and 318,532.64 is: 439,579.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,396.12 : 673,993.32 = 318,532.64 : x
  2. Step 2: Convert to fraction form
    488,396.12/673,993.32 = 318,532.64/x
  3. Step 3: Cross multiply
    488,396.12x = 673,993.32 × 318,532.64
  4. Step 4: Simplify right side
    488,396.12x = 214,688,871,561.97
  5. Step 5: Solve for x
    x = 214,688,871,561.97/488,396.12
  6. Step 6: Final answer
    x = 439,579.40

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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.