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Finding the Fourth Proportional to 345,878.85, 515,379.73 and 308,149

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Solution

The fourth proportional to 345,878.85, 515,379.73 and 308,149 is: 459,160.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,878.85 : 515,379.73 = 308,149 : x
  2. Step 2: Convert to fraction form
    345,878.85/515,379.73 = 308,149/x
  3. Step 3: Cross multiply
    345,878.85x = 515,379.73 × 308,149
  4. Step 4: Simplify right side
    345,878.85x = 158,813,748,419.77
  5. Step 5: Solve for x
    x = 158,813,748,419.77/345,878.85
  6. Step 6: Final answer
    x = 459,160.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.