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Finding the Fourth Proportional to 553,874.42, 764,360.22 and 308,856.78

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Solution

The fourth proportional to 553,874.42, 764,360.22 and 308,856.78 is: 426,229.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,874.42 : 764,360.22 = 308,856.78 : x
  2. Step 2: Convert to fraction form
    553,874.42/764,360.22 = 308,856.78/x
  3. Step 3: Cross multiply
    553,874.42x = 764,360.22 × 308,856.78
  4. Step 4: Simplify right side
    553,874.42x = 236,077,836,309.29
  5. Step 5: Solve for x
    x = 236,077,836,309.29/553,874.42
  6. Step 6: Final answer
    x = 426,229.90

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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.