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Finding the Fourth Proportional to 605,190.81, 905,257.92 and 425,263.58

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Solution

The fourth proportional to 605,190.81, 905,257.92 and 425,263.58 is: 636,118.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,190.81 : 905,257.92 = 425,263.58 : x
  2. Step 2: Convert to fraction form
    605,190.81/905,257.92 = 425,263.58/x
  3. Step 3: Cross multiply
    605,190.81x = 905,257.92 × 425,263.58
  4. Step 4: Simplify right side
    605,190.81x = 384,973,223,882.55
  5. Step 5: Solve for x
    x = 384,973,223,882.55/605,190.81
  6. Step 6: Final answer
    x = 636,118.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.