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Finding the Fourth Proportional to 515,611.98, 773,455.23 and 215,790.89

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Solution

The fourth proportional to 515,611.98, 773,455.23 and 215,790.89 is: 323,701.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,611.98 : 773,455.23 = 215,790.89 : x
  2. Step 2: Convert to fraction form
    515,611.98/773,455.23 = 215,790.89/x
  3. Step 3: Cross multiply
    515,611.98x = 773,455.23 × 215,790.89
  4. Step 4: Simplify right side
    515,611.98x = 166,904,588,589.58
  5. Step 5: Solve for x
    x = 166,904,588,589.58/515,611.98
  6. Step 6: Final answer
    x = 323,701.92

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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.