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Finding the Fourth Proportional to 488,815.88, 674,564.31 and 284,987.48

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Solution

The fourth proportional to 488,815.88, 674,564.31 and 284,987.48 is: 393,281.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,815.88 : 674,564.31 = 284,987.48 : x
  2. Step 2: Convert to fraction form
    488,815.88/674,564.31 = 284,987.48/x
  3. Step 3: Cross multiply
    488,815.88x = 674,564.31 × 284,987.48
  4. Step 4: Simplify right side
    488,815.88x = 192,242,379,432.02
  5. Step 5: Solve for x
    x = 192,242,379,432.02/488,815.88
  6. Step 6: Final answer
    x = 393,281.78

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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.