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Finding the Fourth Proportional to 231,878.60, 347,817.90 and 216,211.40

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Solution

The fourth proportional to 231,878.60, 347,817.90 and 216,211.40 is: 324,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,878.60 : 347,817.90 = 216,211.40 : x
  2. Step 2: Convert to fraction form
    231,878.60/347,817.90 = 216,211.40/x
  3. Step 3: Cross multiply
    231,878.60x = 347,817.90 × 216,211.40
  4. Step 4: Simplify right side
    231,878.60x = 75,202,195,104.06
  5. Step 5: Solve for x
    x = 75,202,195,104.06/231,878.60
  6. Step 6: Final answer
    x = 324,317.10

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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.