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Finding the Fourth Proportional to 667,056.70, 920,531.62 and 361,124.98

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Solution

The fourth proportional to 667,056.70, 920,531.62 and 361,124.98 is: 498,348.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,056.70 : 920,531.62 = 361,124.98 : x
  2. Step 2: Convert to fraction form
    667,056.70/920,531.62 = 361,124.98/x
  3. Step 3: Cross multiply
    667,056.70x = 920,531.62 × 361,124.98
  4. Step 4: Simplify right side
    667,056.70x = 332,426,962,861.87
  5. Step 5: Solve for x
    x = 332,426,962,861.87/667,056.70
  6. Step 6: Final answer
    x = 498,348.89

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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.