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Finding the Fourth Proportional to 314,661.90, 434,231.72 and 171,421.60

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Solution

The fourth proportional to 314,661.90, 434,231.72 and 171,421.60 is: 236,560.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    314,661.90 : 434,231.72 = 171,421.60 : x
  2. Step 2: Convert to fraction form
    314,661.90/434,231.72 = 171,421.60/x
  3. Step 3: Cross multiply
    314,661.90x = 434,231.72 × 171,421.60
  4. Step 4: Simplify right side
    314,661.90x = 74,436,696,213.15
  5. Step 5: Solve for x
    x = 74,436,696,213.15/314,661.90
  6. Step 6: Final answer
    x = 236,560.88

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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.