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Finding the Fourth Proportional to 231,086.60, 345,938.70 and 217,416.20

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Solution

The fourth proportional to 231,086.60, 345,938.70 and 217,416.20 is: 325,473.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,086.60 : 345,938.70 = 217,416.20 : x
  2. Step 2: Convert to fraction form
    231,086.60/345,938.70 = 217,416.20/x
  3. Step 3: Cross multiply
    231,086.60x = 345,938.70 × 217,416.20
  4. Step 4: Simplify right side
    231,086.60x = 75,212,677,586.94
  5. Step 5: Solve for x
    x = 75,212,677,586.94/231,086.60
  6. Step 6: Final answer
    x = 325,473.99

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1.5x scale

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.