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Finding the Fourth Proportional to 285,940.60, 428,910.90 and 157,509.03

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Solution

The fourth proportional to 285,940.60, 428,910.90 and 157,509.03 is: 236,263.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,940.60 : 428,910.90 = 157,509.03 : x
  2. Step 2: Convert to fraction form
    285,940.60/428,910.90 = 157,509.03/x
  3. Step 3: Cross multiply
    285,940.60x = 428,910.90 × 157,509.03
  4. Step 4: Simplify right side
    285,940.60x = 67,557,339,815.43
  5. Step 5: Solve for x
    x = 67,557,339,815.43/285,940.60
  6. Step 6: Final answer
    x = 236,263.55

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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.