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Finding the Fourth Proportional to 429,783.22, 644,522.28 and 126,092.62

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Solution

The fourth proportional to 429,783.22, 644,522.28 and 126,092.62 is: 189,094.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,783.22 : 644,522.28 = 126,092.62 : x
  2. Step 2: Convert to fraction form
    429,783.22/644,522.28 = 126,092.62/x
  3. Step 3: Cross multiply
    429,783.22x = 644,522.28 × 126,092.62
  4. Step 4: Simplify right side
    429,783.22x = 81,269,502,933.57
  5. Step 5: Solve for x
    x = 81,269,502,933.57/429,783.22
  6. Step 6: Final answer
    x = 189,094.17

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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.