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Finding the Fourth Proportional to 667,056.70, 919,916.31 and 617,517.10

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Solution

The fourth proportional to 667,056.70, 919,916.31 and 617,517.10 is: 851,597.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,056.70 : 919,916.31 = 617,517.10 : x
  2. Step 2: Convert to fraction form
    667,056.70/919,916.31 = 617,517.10/x
  3. Step 3: Cross multiply
    667,056.70x = 919,916.31 × 617,517.10
  4. Step 4: Simplify right side
    667,056.70x = 568,064,051,993.90
  5. Step 5: Solve for x
    x = 568,064,051,993.90/667,056.70
  6. Step 6: Final answer
    x = 851,597.85

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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.