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Finding the Fourth Proportional to 379,419.60, 523,628.92 and 216,083.05

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Solution

The fourth proportional to 379,419.60, 523,628.92 and 216,083.05 is: 298,211.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,419.60 : 523,628.92 = 216,083.05 : x
  2. Step 2: Convert to fraction form
    379,419.60/523,628.92 = 216,083.05/x
  3. Step 3: Cross multiply
    379,419.60x = 523,628.92 × 216,083.05
  4. Step 4: Simplify right side
    379,419.60x = 113,147,333,021.39
  5. Step 5: Solve for x
    x = 113,147,333,021.39/379,419.60
  6. Step 6: Final answer
    x = 298,211.62

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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.