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Finding the Fourth Proportional to 512,593.32, 768,951.54 and 213,276.45

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Solution

The fourth proportional to 512,593.32, 768,951.54 and 213,276.45 is: 319,940.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,593.32 : 768,951.54 = 213,276.45 : x
  2. Step 2: Convert to fraction form
    512,593.32/768,951.54 = 213,276.45/x
  3. Step 3: Cross multiply
    512,593.32x = 768,951.54 × 213,276.45
  4. Step 4: Simplify right side
    512,593.32x = 163,999,254,673.23
  5. Step 5: Solve for x
    x = 163,999,254,673.23/512,593.32
  6. Step 6: Final answer
    x = 319,940.29

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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.