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Finding the Fourth Proportional to 231,647.80, 348,214.10 and 215,212.60

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Solution

The fourth proportional to 231,647.80, 348,214.10 and 215,212.60 is: 323,508.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,647.80 : 348,214.10 = 215,212.60 : x
  2. Step 2: Convert to fraction form
    231,647.80/348,214.10 = 215,212.60/x
  3. Step 3: Cross multiply
    231,647.80x = 348,214.10 × 215,212.60
  4. Step 4: Simplify right side
    231,647.80x = 74,940,061,817.66
  5. Step 5: Solve for x
    x = 74,940,061,817.66/231,647.80
  6. Step 6: Final answer
    x = 323,508.63

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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.