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Finding the Fourth Proportional to 415,309.88, 623,109.30 and 131,044.28

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Solution

The fourth proportional to 415,309.88, 623,109.30 and 131,044.28 is: 196,612.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,309.88 : 623,109.30 = 131,044.28 : x
  2. Step 2: Convert to fraction form
    415,309.88/623,109.30 = 131,044.28/x
  3. Step 3: Cross multiply
    415,309.88x = 623,109.30 × 131,044.28
  4. Step 4: Simplify right side
    415,309.88x = 81,654,909,579.80
  5. Step 5: Solve for x
    x = 81,654,909,579.80/415,309.88
  6. Step 6: Final answer
    x = 196,612.01

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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.