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Finding the Fourth Proportional to 512,391.20, 768,623.54 and 147,637.86

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Solution

The fourth proportional to 512,391.20, 768,623.54 and 147,637.86 is: 221,467.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,391.20 : 768,623.54 = 147,637.86 : x
  2. Step 2: Convert to fraction form
    512,391.20/768,623.54 = 147,637.86/x
  3. Step 3: Cross multiply
    512,391.20x = 768,623.54 × 147,637.86
  4. Step 4: Simplify right side
    512,391.20x = 113,477,934,591.22
  5. Step 5: Solve for x
    x = 113,477,934,591.22/512,391.20
  6. Step 6: Final answer
    x = 221,467.38

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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.