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Finding the Fourth Proportional to 488,431.90, 731,663.70 and 328,999.60

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Solution

The fourth proportional to 488,431.90, 731,663.70 and 328,999.60 is: 492,836.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,431.90 : 731,663.70 = 328,999.60 : x
  2. Step 2: Convert to fraction form
    488,431.90/731,663.70 = 328,999.60/x
  3. Step 3: Cross multiply
    488,431.90x = 731,663.70 × 328,999.60
  4. Step 4: Simplify right side
    488,431.90x = 240,717,064,634.52
  5. Step 5: Solve for x
    x = 240,717,064,634.52/488,431.90
  6. Step 6: Final answer
    x = 492,836.49

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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.