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Finding the Fourth Proportional to 285,891.79, 428,296.39 and 190,835.35

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Solution

The fourth proportional to 285,891.79, 428,296.39 and 190,835.35 is: 285,891.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,891.79 : 428,296.39 = 190,835.35 : x
  2. Step 2: Convert to fraction form
    285,891.79/428,296.39 = 190,835.35/x
  3. Step 3: Cross multiply
    285,891.79x = 428,296.39 × 190,835.35
  4. Step 4: Simplify right side
    285,891.79x = 81,734,091,489.39
  5. Step 5: Solve for x
    x = 81,734,091,489.39/285,891.79
  6. Step 6: Final answer
    x = 285,891.71

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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.