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Finding the Fourth Proportional to 217,687.60, 326,531.40 and 190,039.60

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Solution

The fourth proportional to 217,687.60, 326,531.40 and 190,039.60 is: 285,059.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,687.60 : 326,531.40 = 190,039.60 : x
  2. Step 2: Convert to fraction form
    217,687.60/326,531.40 = 190,039.60/x
  3. Step 3: Cross multiply
    217,687.60x = 326,531.40 × 190,039.60
  4. Step 4: Simplify right side
    217,687.60x = 62,053,896,643.44
  5. Step 5: Solve for x
    x = 62,053,896,643.44/217,687.60
  6. Step 6: Final answer
    x = 285,059.40

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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.