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Finding the Fourth Proportional to 316,144.72, 436,263.60 and 172,876.96

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Solution

The fourth proportional to 316,144.72, 436,263.60 and 172,876.96 is: 238,561.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,144.72 : 436,263.60 = 172,876.96 : x
  2. Step 2: Convert to fraction form
    316,144.72/436,263.60 = 172,876.96/x
  3. Step 3: Cross multiply
    316,144.72x = 436,263.60 × 172,876.96
  4. Step 4: Simplify right side
    316,144.72x = 75,419,924,926.66
  5. Step 5: Solve for x
    x = 75,419,924,926.66/316,144.72
  6. Step 6: Final answer
    x = 238,561.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.