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Finding the Fourth Proportional to 618,379.20, 926,360.73 and 426,219.48

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Solution

The fourth proportional to 618,379.20, 926,360.73 and 426,219.48 is: 638,496.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,379.20 : 926,360.73 = 426,219.48 : x
  2. Step 2: Convert to fraction form
    618,379.20/926,360.73 = 426,219.48/x
  3. Step 3: Cross multiply
    618,379.20x = 926,360.73 × 426,219.48
  4. Step 4: Simplify right side
    618,379.20x = 394,832,988,633.02
  5. Step 5: Solve for x
    x = 394,832,988,633.02/618,379.20
  6. Step 6: Final answer
    x = 638,496.55

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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.