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Finding the Fourth Proportional to 345,136.66, 517,268.80 and 155,394.97

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Solution

The fourth proportional to 345,136.66, 517,268.80 and 155,394.97 is: 232,896.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,136.66 : 517,268.80 = 155,394.97 : x
  2. Step 2: Convert to fraction form
    345,136.66/517,268.80 = 155,394.97/x
  3. Step 3: Cross multiply
    345,136.66x = 517,268.80 × 155,394.97
  4. Step 4: Simplify right side
    345,136.66x = 80,380,969,657.94
  5. Step 5: Solve for x
    x = 80,380,969,657.94/345,136.66
  6. Step 6: Final answer
    x = 232,896.06

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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.