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Finding the Fourth Proportional to 667,812.39, 921,790.38 and 426,094.56

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Solution

The fourth proportional to 667,812.39, 921,790.38 and 426,094.56 is: 588,144.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,812.39 : 921,790.38 = 426,094.56 : x
  2. Step 2: Convert to fraction form
    667,812.39/921,790.38 = 426,094.56/x
  3. Step 3: Cross multiply
    667,812.39x = 921,790.38 × 426,094.56
  4. Step 4: Simplify right side
    667,812.39x = 392,769,859,638.91
  5. Step 5: Solve for x
    x = 392,769,859,638.91/667,812.39
  6. Step 6: Final answer
    x = 588,144.01

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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.