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Finding the Fourth Proportional to 488,400.90, 731,617.20 and 328,968.60

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Solution

The fourth proportional to 488,400.90, 731,617.20 and 328,968.60 is: 492,790.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,400.90 : 731,617.20 = 328,968.60 : x
  2. Step 2: Convert to fraction form
    488,400.90/731,617.20 = 328,968.60/x
  3. Step 3: Cross multiply
    488,400.90x = 731,617.20 × 328,968.60
  4. Step 4: Simplify right side
    488,400.90x = 240,679,086,019.92
  5. Step 5: Solve for x
    x = 240,679,086,019.92/488,400.90
  6. Step 6: Final answer
    x = 492,790.01

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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.