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Finding the Fourth Proportional to 343,609.55, 515,290.83 and 118,908.98

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Solution

The fourth proportional to 343,609.55, 515,290.83 and 118,908.98 is: 178,320.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,609.55 : 515,290.83 = 118,908.98 : x
  2. Step 2: Convert to fraction form
    343,609.55/515,290.83 = 118,908.98/x
  3. Step 3: Cross multiply
    343,609.55x = 515,290.83 × 118,908.98
  4. Step 4: Simplify right side
    343,609.55x = 61,272,706,998.65
  5. Step 5: Solve for x
    x = 61,272,706,998.65/343,609.55
  6. Step 6: Final answer
    x = 178,320.73

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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.