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Finding the Fourth Proportional to 553,640.23, 764,023.53 and 298,991.44

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Solution

The fourth proportional to 553,640.23, 764,023.53 and 298,991.44 is: 412,608.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,640.23 : 764,023.53 = 298,991.44 : x
  2. Step 2: Convert to fraction form
    553,640.23/764,023.53 = 298,991.44/x
  3. Step 3: Cross multiply
    553,640.23x = 764,023.53 × 298,991.44
  4. Step 4: Simplify right side
    553,640.23x = 228,436,495,428.58
  5. Step 5: Solve for x
    x = 228,436,495,428.58/553,640.23
  6. Step 6: Final answer
    x = 412,608.19

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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.