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Finding the Fourth Proportional to 667,056.20, 920,530.94 and 361,124.49

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Solution

The fourth proportional to 667,056.20, 920,530.94 and 361,124.49 is: 498,348.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,056.20 : 920,530.94 = 361,124.49 : x
  2. Step 2: Convert to fraction form
    667,056.20/920,530.94 = 361,124.49/x
  3. Step 3: Cross multiply
    667,056.20x = 920,530.94 × 361,124.49
  4. Step 4: Simplify right side
    667,056.20x = 332,426,259,828.44
  5. Step 5: Solve for x
    x = 332,426,259,828.44/667,056.20
  6. Step 6: Final answer
    x = 498,348.21

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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.