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Finding the Fourth Proportional to 667,363.19, 920,960.39 and 361,439.39

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Solution

The fourth proportional to 667,363.19, 920,960.39 and 361,439.39 is: 498,785.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,363.19 : 920,960.39 = 361,439.39 : x
  2. Step 2: Convert to fraction form
    667,363.19/920,960.39 = 361,439.39/x
  3. Step 3: Cross multiply
    667,363.19x = 920,960.39 × 361,439.39
  4. Step 4: Simplify right side
    667,363.19x = 332,871,361,575.76
  5. Step 5: Solve for x
    x = 332,871,361,575.76/667,363.19
  6. Step 6: Final answer
    x = 498,785.92

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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.