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Finding the Fourth Proportional to 667,696.42, 920,912.47 and 574,720.43

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Solution

The fourth proportional to 667,696.42, 920,912.47 and 574,720.43 is: 792,676.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,696.42 : 920,912.47 = 574,720.43 : x
  2. Step 2: Convert to fraction form
    667,696.42/920,912.47 = 574,720.43/x
  3. Step 3: Cross multiply
    667,696.42x = 920,912.47 × 574,720.43
  4. Step 4: Simplify right side
    667,696.42x = 529,267,211,616.24
  5. Step 5: Solve for x
    x = 529,267,211,616.24/667,696.42
  6. Step 6: Final answer
    x = 792,676.43

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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.