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Finding the Fourth Proportional to 512,586.72, 768,592.08 and 212,865.66

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Solution

The fourth proportional to 512,586.72, 768,592.08 and 212,865.66 is: 319,178.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,586.72 : 768,592.08 = 212,865.66 : x
  2. Step 2: Convert to fraction form
    512,586.72/768,592.08 = 212,865.66/x
  3. Step 3: Cross multiply
    512,586.72x = 768,592.08 × 212,865.66
  4. Step 4: Simplify right side
    512,586.72x = 163,606,860,379.97
  5. Step 5: Solve for x
    x = 163,606,860,379.97/512,586.72
  6. Step 6: Final answer
    x = 319,178.89

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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.