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Finding the Fourth Proportional to 609,189, 840,564.18 and 394,299.24

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Solution

The fourth proportional to 609,189, 840,564.18 and 394,299.24 is: 544,057.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,189 : 840,564.18 = 394,299.24 : x
  2. Step 2: Convert to fraction form
    609,189/840,564.18 = 394,299.24/x
  3. Step 3: Cross multiply
    609,189x = 840,564.18 × 394,299.24
  4. Step 4: Simplify right side
    609,189x = 331,433,817,345.22
  5. Step 5: Solve for x
    x = 331,433,817,345.22/609,189
  6. Step 6: Final answer
    x = 544,057.46

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1.5x scale

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.