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Finding the Fourth Proportional to 512,087.20, 768,279.20 and 157,153.60

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Solution

The fourth proportional to 512,087.20, 768,279.20 and 157,153.60 is: 235,775.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,087.20 : 768,279.20 = 157,153.60 : x
  2. Step 2: Convert to fraction form
    512,087.20/768,279.20 = 157,153.60/x
  3. Step 3: Cross multiply
    512,087.20x = 768,279.20 × 157,153.60
  4. Step 4: Simplify right side
    512,087.20x = 120,737,842,085.12
  5. Step 5: Solve for x
    x = 120,737,842,085.12/512,087.20
  6. Step 6: Final answer
    x = 235,775.94

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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.