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Finding the Fourth Proportional to 667,274.44, 921,063.18 and 405,628.78

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Solution

The fourth proportional to 667,274.44, 921,063.18 and 405,628.78 is: 559,904.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,274.44 : 921,063.18 = 405,628.78 : x
  2. Step 2: Convert to fraction form
    667,274.44/921,063.18 = 405,628.78/x
  3. Step 3: Cross multiply
    667,274.44x = 921,063.18 × 405,628.78
  4. Step 4: Simplify right side
    667,274.44x = 373,609,734,006.32
  5. Step 5: Solve for x
    x = 373,609,734,006.32/667,274.44
  6. Step 6: Final answer
    x = 559,904.16

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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.